Novel compositions
Abstract
Abstract LIGHT SENSITIVE ESTER-AMIDE POLYMERS ARE PROVIDED. THE POLYMERS ARE CHARACTERIZED BY THE RECURRING UNIT: -CH(-CO-R1)-CH(-CO-R2)-CH(-R")-CH2- WHEREIN ONE OF R1 AND R2 REPRESENTS-O-(LOWER-ALKYL) AND THE OTHER OF R1 AND R2 REPRESENTS-NHR WHEREIN R IS A STILBENE RESIDUE HAVING THE FORMULA: (LOWER-ALKOXY)N-(PHENYLENE)-CH=CH-(PHENYLENE)- N=1 TO 3, AND R"=LOWER-ALKOXY OR PHENYL. THE POLYMERS HAVE AN AVERAGE MOLECULAR WEIGHT WITHIN THE RANGE OF ABOUT 100,000 TO ABOUT 1,250,000. THE ABOVE ESTERAMIDE POLYMERS UNDERGO CROSS-LINKING ON EXPOSURE TO ULTRAVIOLET LIGHT AND CAN BE USED IN PHOTO-RESIST SYSTEMS. THE ABOVE ESTER-AMIDE POLYMERS ARE PREPARED BY REACTING THE APPROPRIATE VINYL ETHER-MLEIC ANHYDRIDE OR STYRENEMALEIC ANHDRIDE COPOLYMER WITH THE APPROPRIATE AMINOSILBENE AND ESTERIFYING THE INTERMEDIATE AMIDE AMINE SALT WITH A LOWER-ALIPHATIC ALCOHOL.
Inventors
- 👤 Adnan A R Sayigh
- 👤 Fred A Stuber
- 👤 Henri Ulrich
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |