Patent Assignment Abstract of Title
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Total Assignments:
3
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Patent #:
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Issue Dt:
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05/01/1990
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Application #:
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07268329
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Filing Dt:
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11/07/1988
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Inventors:
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CHRISTINE A. COSTELLO, ROBERT K. PINSCHMIDT JR., TA-WANG LAI
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Title:
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HYDROLYZED CO-POLYMERS OF N-VINYLAMIDE AND ACRYLAMIDE FOR USE AS WATERLOSS CONTROL ADDITIVES IN DRILLING MUD
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Assignment:
1
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ASSIGNMENT OF ASSIGNORS INTEREST.
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| P.O. BOX 538 |
| ALLENTOWN, PENNSYLVANIA 18105 |
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| PATENT ASSISTANT |
| AIR PRODUCTS & CHEMICALS, INC. |
| P. O. BOX 538 |
| ALLENTOWN, PA 18105 |
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Assignment:
2
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ASSIGNMENT OF ASSIGNORS INTEREST.
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| ALLENTOWN, PENNSYLVANIA 18195 |
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| PATENT ASSISTANT |
| AIR PRODUCTS & CHEMICALS, INC. |
| P. O. BOX 538 |
| ALLENTOWN, PA 18105 |
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Assignment:
3
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ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
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| 5TH AVENUE AND BIGELOW BOULEVARD |
| PITTSBURGH, PENNSYLVANIA 15260 |
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| WOODCOCK WASHBURN KURTZ, ET AL. |
| JOHN W. CALDWELL |
| ONE LIBERTY PLACE, 46TH FLOOR |
| 1650 MARKET STREET |
| PHILADELPIHIA, PA 19103-7301 |
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