skip navigationU S P T O SealUnited States Patent and Trademark Office AOTW logo
Home|Site Index|Search|Guides|Contacts|eBusiness|eBiz alerts|News|Help
Assignments on the Web > Patent Query
Patent Assignment Assignor Details
NOTE:Results display only for issued patents and published applications. For pending or abandoned applications please consult USPTO staff.

Assignor Name : IRWIN, ROBERT S.
Total Assignments: 28
Assignment: 1
Reel/Frame:003915/0056   Pages: 1
Recorded: 10/07/1981
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
06/26/1981
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY, WILMINGTON, DE., A CORP. OF DE.
DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4335232
NONE
06281200
Correspondence name and address
SOL SCHWARTZ
LEG. DEPT.
E.I. DU PONT DE NEMOURS & CO.
WILMINGTON, DE 19898
Assignment: 2
Reel/Frame:004141/0734   Pages: 2
Recorded: 06/13/1983
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
11/24/1981
Assignee
1
DOW CHEMICAL COMPANY, THE
MIDLAND, MICHIGAN 48640
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4398003
NONE
06325405
Correspondence name and address
RICHARD G. WATERMAN
P. O. BOX 1967
MIDLAND, MI 48640
Assignment: 3
Reel/Frame:004021/0761   Pages: 1
Recorded: 04/16/1982
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
12/16/1981
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY, A CORP OF DE
WILMINGTON, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4383105
NONE
06334891
Correspondence name and address
SOL SCHWARTZ
LEGAL DEPT.
E.I. DU PONT DE NEMOURS & CO.
WILMINGTON, DE 19898
Assignment: 4
Reel/Frame:004037/0316   Pages: 1
Recorded: 09/17/1982
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
08/05/1982
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY, A CORP OF DE.
WILMINGTON, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4381389
NONE
06398563
Correspondence name and address
SOL SCHWARTS
C/O E.I. DU PONT DE NEMOURS AND CO.
LEGAL DEPT., PAT DIV.
WILMINGTON, DE. 19898
Assignment: 5
Reel/Frame:004122/0957   Pages: 1
Recorded: 04/29/1983
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
03/03/1983
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY
A CORP OF DE
WILMINGTON, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4439596
NONE
06477585
Correspondence name and address
SOL SCHWARTZ
LEGAL DEPT.,
E. I. DU PONT DE NEMOURS & CO.
WILMINGTON, DE 19898
Assignment: 6
Reel/Frame:004218/0399   Pages: 1
Recorded: 02/06/1984
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
12/09/1983
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY
A CORP OF DE
WILMINGTON, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4499259
NONE
06562114
Correspondence name and address
SOL SCHWARTZ
LEGAL DEPARTMENT
E. I. DU PONT DE NEMOURS & CO.
WILMINGTON, DE 19898
Assignment: 7
Reel/Frame:004218/0401   Pages: 1
Recorded: 02/06/1984
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
12/09/1983
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY
A DE CORP
WILMINGTON, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4496712
NONE
06562116
Correspondence name and address
SOL SCHWARTZ
LEGAL DEPARTMENT
E. I. DU PONT DE NEMOURS & CO.
WILMINGTON, DE 19898
Assignment: 8
Reel/Frame:004218/0398   Pages: 1
Recorded: 02/06/1984
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
12/14/1983
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY
A CORP OF DE
WILMINGTON, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4487916
NONE
06562115
Correspondence name and address
SOL SCHWARTZ
LEGAL DEPARTMENT
E. I. DU PONT DE NEMOURS & CO.
WILMINGTON, DE 19898
Assignment: 9
Reel/Frame:004287/0139   Pages: 2
Recorded: 08/06/1984
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignors
1
IRWIN, ROBERT S.
Exec Dt:
06/22/1984
2
LOGULLO, FRANCIS M. SR.
Exec Dt:
06/22/1984
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY, A DE CORP.
WILMINGTON, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4500699
NONE
06624829
Correspondence name and address
SOL SCHWARTZ
LEGAL DEPARTMENT
E. I. DU PONT DE NEMOURS & CO.
WILMINGTON, DE 19898
Assignment: 10
Reel/Frame:004491/0937   Pages: 1
Recorded: 12/24/1985
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
11/08/1985
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY, WILMINGTON DELAWARE A CORP OF DE.
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4640972
NONE
06798512
Correspondence name and address
LEGAL DEPT.
E. I. DU PONT DE NEMOURS & CO.
WILMINGTON, DE 19898
Assignment: 11
Reel/Frame:004626/0546   Pages: 1
Recorded: 11/05/1986
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
09/25/1986
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY
A CORP OF DE
WILMINGTON, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4719280
NONE
06912082
Correspondence name and address
SOL SCHWARTZ
PATENT DIVISION
LEGAL DEPT.,
E. I. DU PONT DE NEMOURS & CO.,
WILMINGTON, DE 19898
Assignment: 12
Reel/Frame:005132/0707   Pages: 1
Recorded: 08/07/1989
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignors
1
IRWIN, ROBERT S.
Exec Dt:
06/29/1989
2
DEAK, GEDEON I.
Exec Dt:
01/23/1989
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY
A CORP. OF DE
WILMINGTON, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4990562
NONE
07301473
Correspondence name and address
D. M. SHOLD
PATENT DIVISION
LEGAL DEPARTMENT
E. I. DU PONT DE NEMOURS & CO.
WILMINGTON, DE 19898
Assignment: 13
Reel/Frame:005206/0851   Pages: 1
Recorded: 01/08/1990
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
12/04/1989
Assignee
1
E. I. DU PONT DE NEMOURS AND COMPANY, A CORP. OF DE
WILMINGTON, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5026819
NONE
07446339
Correspondence name and address
SOL SCHWARTZ
PATENT DIVISION
LEGAL DEPARTMENT
E.I. DU PONT DE NEMOURS & CO.
WILMINGTON, DE 19898
Assignment: 14
Reel/Frame:005212/0319   Pages: 1
Recorded: 01/11/1990
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
12/04/1989
Assignee
1
E. I. DU PONT DE NEMOURS AND COMPANY
A CORP. OF DE.
WILMINGTON, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5039785
NONE
07446338
Correspondence name and address
SOL SCHWARTZ
PATENT DIVISION
LEGAL DEPARTMENT
E.I. DU PONT DE NEMOURS & CO.
WILMINGTON, DE 19898
Assignment: 15
Reel/Frame:005281/0813   Pages: 1
Recorded: 04/30/1990
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
04/03/1990
Assignee
1
E. I. DU PONT DE NEMOURS AND COMPANY, A CORP. OF DELAWARE
WILMINGTON, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5004834
NONE
07505342
Correspondence name and address
SOL SCHWARTZ
PATENT DIVISION
LEGAL DEPARTMENT
E. I. DU PONT DE NEMOURS & C.
WILMINGTON, DE 19898
Assignment: 16
Reel/Frame:005366/0127   Pages: 2
Recorded: 07/19/1990
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
06/12/1990
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY, A CORP. OF DE
WILMINGTON,, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5122416
NONE
07538060
Correspondence name and address
SOL SCHWARTZ
PATENT DIVISION, LEGAL DEPT.
E. I. DE PONT DE NEMOURS & CO.
WILMINGTON, DE 19898
Assignment: 17
Reel/Frame:005833/0151   Pages: 2
Recorded: 09/04/1991
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
02/20/1991
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY A CORP. OF DELAWARE
WILMINGTON, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5459231
NONE
07662197
Correspondence name and address
BARBARA C. SIEGELL
PATENT RECORDS CENTER
LEGAL DEPARTMENT
E. I. DU PONT DE NEMOURS & CO.
WILMINGTON, DE 19898
Assignment: 18
Reel/Frame:005689/0546   Pages: 2
Recorded: 05/01/1991
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
04/04/1991
Assignee
1
E. I. DU PONT DE NEMOURS AND COMPANY A CORP. OF DE
WILMINGTON,, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5175236
NONE
07683052
Correspondence name and address
SOL SCHWARTZ
PATENT RECORDS CENTER
LEGAL
E. I. DU PONT DE NEMOURS & CO.
WILMINGTON, DE 19898
Assignment: 19
Reel/Frame:005925/0772   Pages: 2
Recorded: 11/26/1991
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
09/27/1991
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY A CORP. OF DELAWARE
WILMINGTON, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5346985
NONE
07772383
Correspondence name and address
BARBARA C. SIEGELL
PATENT DIVISION
LEGAL DEPARTMENT
E.I. DU PONT DE NEMOURS & COMPANY
WILMINGTON, DE 19898
Assignment: 20
Reel/Frame:006560/0654   Pages: 2
Recorded: 05/14/1993
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
09/27/1991
Assignee
1
E. I. DU PONT DE NEMOURS AND COMPANY
LEGAL - PATENTS
1007 MARKET STREET
WILMINGTON, DELAWARE 19898
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5346985
NONE
07772383
Correspondence name and address
E.I. DU PONT DE NEMOURS COMPANY
BARBARA C. SIEGELL
LEGAL - PATENTS
1007 MARKET STREET
WILMINGTON, DELAWARE 19898
Assignment: 21
Reel/Frame:005984/0549   Pages: 2
Recorded: 01/23/1992
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
10/15/1991
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY A CORPORATION OF DELAWARE
WILMINGTON,
DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5202410
NONE
07783703
Correspondence name and address
SOL SCHWARTZ
PATENT RECORDS CENTER
E. I. DU PONT DE NEMOURS & CO.
WILMINGTON, DE 19898
Assignment: 22
Reel/Frame:005951/0632   Pages: 2
Recorded: 12/16/1991
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
10/28/1991
Assignee
1
E. I. DU PONT DE NEMOURS AND COMPANY
A CORPORATION OF DE
WILMINGTON, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5212258
NONE
07784346
Correspondence name and address
BARBARA C. SIEGELL
PATENT RECORDS CENTER
LEGAL DEPT.
E. I. DU PONT DE NEMOURS & CO.
WILMINGTON, DE 19898
Assignment: 23
Reel/Frame:006159/0332   Pages: 2
Recorded: 05/15/1992
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
04/13/1992
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY, A CORP. OF DELAWARE
WILMINGTON, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5219898
NONE
07868689
Correspondence name and address
SOL SCHWARTZ
C/O E.I. DU PONT DE NEMOURS AND COMPANY
DUPONT LEGAL - PATENT
WILMINGTON, DE 19898
Assignment: 24
Reel/Frame:006190/0337   Pages: 2
Recorded: 07/24/1992
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
06/19/1992
Assignee
1
E. I. DU PONT DE NEMOURS AND COMPANY A CORP. OF DELAWARE
WILMINGTON, DELAWARE
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5310861
NONE
07904192
Correspondence name and address
E. I. DU PONT DE NEMOURS AND COMPANY
BARBARA C. SIEGELL
DUPONT LEGAL - PATENT
WILMINGTON, DELAWARE 19898
Assignment: 25
Reel/Frame:006531/0798   Pages: 2
Recorded: 05/25/1993
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
04/05/1993
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY
LEGAL - PATENTS
1007 MARKET STREET
WILMINGTON, DELAWARE 19898
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5292856
NONE
08044013
Correspondence name and address
SOL SCHWARTZ
E. I. DU PONT DE NEMOURS COMPANY
LEGAL - PATENTS
1007 MARKET STREET
WILMINGTON, DE 19898
Assignment: 26
Reel/Frame:006596/0881   Pages: 2
Recorded: 07/08/1993
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
05/20/1993
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY
LEGAL - PATENTS
1007 MARKET STREET
WILMINGTON, DELAWARE 19898
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5334693
NONE
08065970
Correspondence name and address
BARBARA C. SIEGELL
E.I. DU PONT DE NEMOURS COMPANY
LEGAL - PATENTS
1007 MARKET STREET
WILMINGTON, DE 19898
Assignment: 27
Reel/Frame:006604/0174   Pages: 2
Recorded: 07/01/1993
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
05/20/1993
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY
LEGAL - PATENTS
1007 MARKET STREET
WILMINGTON, DELAWARE 19898
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5395917
NONE
08065502
Correspondence name and address
BARBARA C. SIEGELL
E. I. DU PONT DE NEMOURS COMPANY
LEGAL - PATENTS
1007 MARKET STREET
WILMINGTON, DE 19898
Assignment: 28
Reel/Frame:006608/0177   Pages: 2
Recorded: 07/28/1993
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor
1
IRWIN, ROBERT S.
Exec Dt:
05/20/1993
Assignee
1
E.I. DU PONT DE NEMOURS AND COMPANY
1007 MARKET STREET
LEGAL - PATENTS
WILMINGTON, DELAWARE 19898
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5288835
NONE
08065300
Correspondence name and address
BARBARA C. SIEGELL
E.I. DU PONT DE NEMOURS COMPANY
LEGAL - PATENTS
1007 MARKET STREET
WILMINGTON, DE 19898

Search Results as of: 05/23/2024 03:30 AM
If you have any comments or questions concerning the data displayed, contact PRD / Assignments at 571-272-3350. v.2.6
Web interface last modified: August 25, 2017 v.2.6
| .HOME | INDEX| SEARCH | eBUSINESS | CONTACT US | PRIVACY STATEMENT