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Patent Assignment Assignor Details
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Assignor Name : STEFFAN, GUIDO
Total Assignments: 25
Assignment: 1
Reel/Frame:004007/0167   Pages: 1
Recorded: 06/28/1982
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignors
1
ALBRECHT, BERNHARD
Exec Dt:
01/09/1980
2
FREY, HANS
Exec Dt:
01/09/1980
3
HABERMACHER, VINZENZ
Exec Dt:
01/09/1980
4
BEHRE, HORST
Exec Dt:
01/09/1980
5
KIENITZ, LUTZ
Exec Dt:
01/09/1980
6
SCHENK, WOLFGANG
Exec Dt:
01/09/1980
7
STEFFAN, GUIDO
Exec Dt:
01/09/1980
8
VOGEL, AXEL
Exec Dt:
01/09/1980
Assignees
1
CIBA-GEIGY AG., 4002 BASLE, SWITZERLAND A COMPANY OF SWITZERLAND
SWITZERLAND
2
BAYER AKTIENGESELLSCHAFT, 5090 LEVEKUSEN, GERMANY A COMPANY OF GERMANY
GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4348334
NONE
06113412
Correspondence name and address
JOSEPH G. KOLODNY
SPRUNG, HORN, KRAMER & WOODS
600 THIRD AVE.
NEW YORK, NY 10016
Assignment: 2
Reel/Frame:004168/0203   Pages: 1
Recorded: 08/26/1983
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
STEFFAN, GUIDO
Exec Dt:
08/18/1983
Assignee
1
BAYER AKTIENGESELLSCHAFT, A CORP. OF GERMANY
LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4764621
NONE
06526932
Correspondence name and address
SPRUNG HORN KRAMER & WOODS
600 3RD AVE.
NEW YORK, NY 10016
Assignment: 3
Reel/Frame:006076/0650   Pages: 2
Recorded: 04/01/1992
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignors
1
CRAMM, GUNTHER
Exec Dt:
01/31/1992
2
LINDEL, HANS
Exec Dt:
01/31/1992
3
STEFFAN, GUIDO
Exec Dt:
01/31/1992
Assignee
1
BAYER AKTIENGESELLSCHAFT, A CORP. OF GERMANY
LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5283338
NONE
07861039
Correspondence name and address
SPRUNG HORN KRAMER & WOODS
1140 AVE. OF THE AMERICAS
NEW YORK, NY 10036
Assignment: 4
Reel/Frame:006368/0918   Pages: 3
Recorded: 12/28/1992
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
STEFFAN, GUIDO
Exec Dt:
08/10/1992
Assignee
1
BAYER AG
KONZERNVERWALTUNG RP
5090 LEVERKUSEN-BAYERWERK, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5723613
NONE
07956126
Correspondence name and address
LEONARD HORN, ESQ.
SPRUNG ET AL
1140 AVENUE OF THE AMERICAS
NEW YORK, NY 10036
Assignment: 5
Reel/Frame:007123/0270   Pages: 2
Recorded: 08/12/1994
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
KLIIPPER, REINHOLD
Exec Dt:
06/03/1994
2
ANTONS, STEFAN
Exec Dt:
06/08/1994
3
STEFFAN, GUIDO
Exec Dt:
06/07/1994
4
MITSCHKER, ALFRED
Exec Dt:
06/09/1994
5
STRUVER, WERNER
Exec Dt:
06/06/1994
6
LUTJENS, HOLJER
Exec Dt:
06/06/1994
Assignee
1
BAYER AKTIENGESELLSCHAFT
D 51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5464875
NONE
08289812
Correspondence name and address
SPRUNG HORN KRAMER & WOODS
LEONARD HORN, ESQ.
660 WHITE PLAINS ROAD
TARRYTOWN, NY 10591
Assignment: 6
Reel/Frame:007617/0406   Pages: 3
Recorded: 08/11/1995
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor
1
STEFFAN, GUIDO
Exec Dt:
06/13/1995
Assignee
1
BAYER AG
KONZERNZENTRALE RP, PATENTE KONZERN
D-51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5719285
NONE
08514278
Correspondence name and address
SPRUNG HORN KRAMER & WOODS
LEONARD HORN
660 WHITE PLAINS ROAD
TARRYTOWN, NY 10591-5144
Assignment: 7
Reel/Frame:007977/0631   Pages: 3
Recorded: 05/03/1996
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
WOLTERS, ERICH
Exec Dt:
02/27/1996
2
STEFFAN, GUIDO
Exec Dt:
02/28/1996
3
KLAUSENER, ALEXANDER
Exec Dt:
02/29/1996
Assignee
1
BAYER AKTIENGESELLSCHAFT
D-51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5681957
NONE
08643214
Correspondence name and address
SPRUNG HORN KRAMER & WOODS
LEONARD HORN
660 WHITE PLAINS ROAD
TARRYTOWN, NEW YORK 10591-5144
Assignment: 8
Reel/Frame:008181/0061   Pages: 3
Recorded: 08/19/1996
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
CRAMM, GUNTHER
Exec Dt:
06/04/1996
2
KASS, VOLKER
Exec Dt:
06/10/1996
3
STEFFAN, GUIDO
Exec Dt:
06/03/1996
Assignee
1
BAYER AKTIENGESELLSCHAFT
D 51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5677453
NONE
08699812
Correspondence name and address
SPRUNG HORN KRAMER & WOODS
LEONARD HORN
660 WHITE PLAINS ROAD
TARRYTOWN, NY 10591-5144
Assignment: 9
Reel/Frame:008286/0715   Pages: 3
Recorded: 10/23/1996
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
MAIS, FRANZ-JOSEF
Exec Dt:
08/09/1996
2
ESSERT, THOMAS
Exec Dt:
08/19/1996
3
FIEGE, HELMUT
Exec Dt:
08/09/1996
4
DURHOLZ, FRIEDRICH
Exec Dt:
08/12/1996
5
STEFFAN, GUIDO
Exec Dt:
08/09/1996
Assignee
1
BAYER AKTIENGESELLSCHAFT
D-51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5679826
NONE
08735717
Correspondence name and address
SPRUNG HORN KRAMER & WOODS
MARK W. RUSSELL
660 WHITE PLAINS ROAD
TARRYTOWN, NEW YORK 10591-5144
Assignment: 10
Reel/Frame:008432/0463   Pages: 3
Recorded: 02/27/1997
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
MULLER, NIKOLAUS
Exec Dt:
01/20/1997
2
STEFFAN, GUIDO
Exec Dt:
01/12/1997
Assignee
1
BAYER AKTIENGESELLSCHAFT
D-51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5693831
NONE
08804622
Correspondence name and address
SPRUNG, HORN, KRAMER & WOODS
WILLIAM C. GERSTENZANG
660 WHITE PLAINS ROAD
TARRYTOWN, NY 10591-5144
Assignment: 11
Reel/Frame:008624/0940   Pages: 3
Recorded: 06/26/1997
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
ANTONS, STEFAN
Exec Dt:
05/05/1997
2
STEFFAN, GUIDO
Exec Dt:
04/30/1997
3
FIEGE, HELMUT
Exec Dt:
04/30/1997
Assignee
1
BAYER AKTIENGESELLSCHAFT
D 51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5872283
NONE
08883267
Correspondence name and address
SPRUNG KRAMER SCHAEFER & BRISCOE
WILLIAM C. GERSTENZANG
660 WHITE PLAINS ROAD
TARRYTOWN, NEW YORK 10591-5144
Assignment: 12
Reel/Frame:008728/0329   Pages: 3
Recorded: 07/07/1997
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
HEUER, LUTZ
Exec Dt:
05/15/1997
2
MULLER, NIKOLAUS
Exec Dt:
05/15/1997
3
STEFFAN, GUIDO
Exec Dt:
05/15/1997
Assignee
1
BAYER AKTIENGESELLSCHAFT
D-51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5969152
NONE
08888889
Correspondence name and address
SPRUNG, KRAMER, SCHAEFER & BRISCOE
MR. WILLIAM C. GERSTENZANG
660 WHITE PLAINS ROAD
TARRYTOWN, NY 10591-5144
Assignment: 13
Reel/Frame:008874/0779   Pages: 3
Recorded: 12/02/1997
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
BEHRE, HOST
Exec Dt:
10/29/1997
2
STEFFAN, GUIDO
Exec Dt:
11/06/1997
Assignee
1
BAYER AKTIENGESELLSCHAFT
D-51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5847217
NONE
08982360
Correspondence name and address
SPRUNG KRAMER SCHAEFER & BRISCOE
PAUL J JUETTNER
660 WHITE PLAINS ROAD
TARRYTOWN, NY 10591-5144
Assignment: 14
Reel/Frame:008934/0605   Pages: 3
Recorded: 01/16/1998
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
MAIS, FRANZ-JOSEF
Exec Dt:
11/07/1997
2
MARHOLD, ALBRECHT
Exec Dt:
11/10/1997
3
STEFFAN, GUIDO
Exec Dt:
11/07/1997
Assignee
1
BAYER AKTIENGESELLSCHAFT
D 51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5900509
NONE
09008252
Correspondence name and address
SPRUNG KRAMER SCHAEFER & BRISCOE
WILLIAM C. GERSTENZANG
660 WHITE PLAINS ROAD
TARRYTOWN, NY 10591-5144
Assignment: 15
Reel/Frame:009702/0294   Pages: 2
Recorded: 12/07/1998
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
STEFFAN, GUIDO
Exec Dt:
10/13/1998
2
HARDENBICKER, GEORG
Exec Dt:
10/12/1998
Assignee
1
BAYER AKTIENGESELLSCHAFT
KONZERNBEREICH RP PATENT UND LIZENZEN
D-51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6162917
NONE
09194983
Correspondence name and address
BAYER CORPORATION
DIDERICO VAN EYL
PATENT DEPARTMENT
100 BAYER ROAD
PITTSBURGH, PA 15205
Assignment: 16
Reel/Frame:011224/0042   Pages: 2
Recorded: 10/02/2000
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
FISHER, MARK ROBERT
Exec Dt:
07/28/1999
2
DEBRAAL, JOHN CHARLES
Exec Dt:
07/28/1999
3
STEFFAN, GUIDO
Exec Dt:
07/12/1999
4
WENZL, PETER P.
Exec Dt:
07/12/1999
Assignee
1
BAYER AKTIENGESELLSCHAFT
PATENTE UND LIZENZEN
KONZERNBEREICH RP
D-51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6294502
NONE
09312884
Correspondence name and address
BAYER CORPORATION
DONNA VEATCH
PATENT DEPARTMENT
100 BAYER ROAD
PITTSBURGH, PA 15205
Assignment: 17
Reel/Frame:010383/0490   Pages: 2
Recorded: 09/27/1999
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
SATTLER, ANDREAS
Exec Dt:
09/06/1999
2
STEFFAN, GUIDO
Exec Dt:
09/07/1999
3
GRIEHSEL, BERND
Exec Dt:
09/13/1999
Assignee
1
BAYER AKTIENGESELLSCHAFT
PATENTE UND LIZENZEN
D-51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6197964
NONE
09402047
Correspondence name and address
BAYER CORPORATION
DIDERICO VAN EYL
PATENT DEPARTMENT
100 BAYER ROAD
PITTSBURGH, PA 15205-9741
Assignment: 18
Reel/Frame:010441/0767   Pages: 2
Recorded: 11/01/1999
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
KUHNLE, WULF
Exec Dt:
09/16/1999
2
MARHOLD, ALBRECHT
Exec Dt:
09/20/1999
3
STEFFAN, GUIDO
Exec Dt:
09/16/1999
Assignee
1
BAYER AKTIENGESELLSCHAFT
PATENTE UND LIZENZEN
D-51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6184417
NONE
09403962
Correspondence name and address
BAYER CORPORATION
DIDERICO VAN EYL
PATENT DEPARTMENT
100 BAYER ROAD
PITTSBURGH, PA 15205-9741
Assignment: 19
Reel/Frame:010692/0462   Pages: 2
Recorded: 02/18/2000
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
KOMOSCHINSKI, JOACHIM
Exec Dt:
12/16/1999
2
FIEGE, HELMUT
Exec Dt:
12/16/1999
3
STEFFAN, GUIDO
Exec Dt:
12/16/1999
4
PAETZ, KLAUS-CHRISTIAN
Exec Dt:
12/20/1999
Assignee
1
BAYER AKTIENGESELLSCHAFT
PATENTE UND LIZENZEN
D-51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6433228
NONE
09486010
Correspondence name and address
BAYER CORPORATION
DIDERICO VAN EYL
400 BAYER ROAD
PATENT DEPARTMENT
PITTSBURGH, PA 15295-9741
Assignment: 20
Reel/Frame:010726/0653   Pages: 2
Recorded: 02/18/2000
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
KOMOSCHINSKI, JOACHIM
Exec Dt:
01/13/2000
2
FIEGER, HELMUT
Exec Dt:
01/21/2000
3
STEFFAN, GUIDO
Exec Dt:
01/24/2000
Assignee
1
BAYER AKTIENGESELLSCHAFT
PATENT UND LIZENZEN
KONZERNBEREICH RP
D-51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6355827
NONE
09485957
Correspondence name and address
BAYER CORPORATION
DIDERICO VAN EYL
PATENT DEPARTMENT
100 BAYER ROAD
PITTSBURGH, PA 15205
Assignment: 21
Reel/Frame:010998/0482   Pages: 2
Recorded: 07/13/2000
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
GIFFELS, GUIDO
Exec Dt:
05/15/2000
2
STEFFAN, GUIDO
Exec Dt:
05/18/2000
Assignee
1
BAYER AKTIENGESELLSCHAFT
D-51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6296788
NONE
09615434
Correspondence name and address
BAYER CORPORATION
RICHARD E.L. HENDERSON
100 BAYER ROAD
PATENT DEPARTMENT
PITTSBURGH, PA 15205-9714
Assignment: 22
Reel/Frame:011899/0511   Pages: 2
Recorded: 06/15/2001
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
LANGE, WALTER
Exec Dt:
01/17/2001
2
KOMOSCHINSKI, JOACHIM
Exec Dt:
01/18/2001
3
STEFFAN, GUIDO
Exec Dt:
01/26/2001
4
KYSELA, ERNST
Exec Dt:
01/19/2001
Assignee
1
BAYER AKTIENGESELLSCHAFT
PATENTE UND LIZENZEN
KONZERNBEREICH RP
D-51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6455725
NONE
09762838
Correspondence name and address
BAYER CORPORATION
DIDERICO VAN EYL
PATENT DEPARTMENT
100 BAYER ROAD
PITTSBURGH, PENNSYLVANIA 15205-9741
Assignment: 23
Reel/Frame:012660/0983   Pages: 2
Recorded: 12/19/2001
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
MAIS, FRANZ-JOSEF
Exec Dt:
10/16/2001
2
CRAMM, GUNTHER
Exec Dt:
10/19/2001
3
KLAUSENER, ALEXANDER
Exec Dt:
10/16/2001
4
STEFFAN, GUIDO
Exec Dt:
10/17/2001
Assignee
1
BAYER AKTIENGESELLSCHAFT
PATENTE UND LIZENZEN
D-51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6822095
NONE
10019093
Correspondence name and address
BAYER CORPORATION
RICHARD E.L. HENDERSON
100 BAYER ROAD
PATENT DEPARTMENT
PITTSBURGH, PA 15205-9741
Assignment: 24
Reel/Frame:012687/0579   Pages: 3
Recorded: 12/19/2001
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
MAIS, FRANZ-JOSEPH
Exec Dt:
10/22/2001
2
CRAMM, GUENTHER
Exec Dt:
11/06/2001
3
KLAUSENER, ALEXANDER
Exec Dt:
10/22/2001
4
STEFFAN, GUIDO
Exec Dt:
10/31/2001
Assignee
1
BAYER AKTIENGESELLSCHAFT
D-51368
LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6441170
NONE
10019092
Correspondence name and address
BAYER CORPORATION
DONNA J. VEATCH
PATENT DEPARTMENT
1OO BAYER ROAD
PITTSBURGH, PA 15205-9741
Assignment: 25
Reel/Frame:012688/0067   Pages: 2
Recorded: 12/20/2001
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
MAIS, FRANZ-JOSEF
Exec Dt:
10/22/2001
2
CRAMM, GUENTHER
Exec Dt:
11/06/2001
3
KLAUSENER, ALEXANDER
Exec Dt:
10/22/2001
4
STEFFAN, GUIDO
Exec Dt:
10/31/2001
Assignee
1
BAYER AKTIENGESELLSCHAFT
D-51368 LEVERKUSEN, GERMANY
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6562970
NONE
10019211
Correspondence name and address
BAYER CORPORATION
PATENT DEPARTMENT
DONNA J. VEATCH
100 BAYER ROAD
PITTSBURGH, PA 15205-9741

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