Patent US3718692A successfully refreshed from Google Patents.
US3718692A
Expired / Lapsed
US
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N-stilbenylacrylamides
Assignee: Pharmacia and Upjohn Co
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Filing: 1971-02-01
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Granted: 1973-02-27
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Expires: 1991-02-01
Abstract
Abstract STILBENES OF THE FORMULA ((LOWER ALKOXY)N-PHENYL)-CH=CH-),(CH2=C(-R)-(COO-A-O)M- CO-NH-)BENZENE WHEREIN N IS AN INTEGER FROM 1 TO 3, M IS AN INTEGER FROM 0 TO 1, A IS LOWER-ALKYLENE AND R IS HYDROGEN OR LOWERALKYL, ARE DISCLOSED, AS WELL AS HOMOPOLYMERS OF SAID COMPOUNDS, AND COPOLYMERS OF SAID COMPOUNDS WITH MONOMERS CONTAINING A POLYMERIZABLE CH2=C<. THE ABOVE STILBENES AND THE POLYMERS DERIVED THEREFROM ARE PHOTOSENSITIVE AND CAN BE USED IN THE PREPARATION OF PHOTORESIST SYSTEMS.
Inventors
- 👤 D Rao
- 👤 A Sayigh
- 👤 H Ulrich
- 👤 F Stuber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:56
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0388; C; C07; C07C; C07C265/00; C07C265/12; C08; C08F; C08F2/00; C08F20/00; C08F20/02; C08F20/10; C08F20/34; C08F20/52; C08F20/54
Claims Analysis
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References 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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |