US3700635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers of n-(tris(hydroxymethyl)methyl)acrylamide
Assignee: Eastman Kodak Co
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Filing: 1971-02-16
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Granted: 1972-10-24
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Expires: 1991-02-16
Abstract
Abstract PHOTOGRAPHIC SILVER HALIDE COMPOSITIONS AND ELEMENTS HAVING IMPROVED COVERING POWER AND SENSITOMERTRIC PROPERTIES, OBTAINED BY EMPLOYING POLYMERIC ADDITIVES IN A PHOTOGRAPHIC BINDER ARE DISCLOSED. SAID POLYMERS COMPRISE RECURRING N-(TRIS(HYDROXYMETHYL)METHYL) ACRYLAMIDE UNITS. PROCESSES FOR EFFECTING SAID IMPROVED PROPERTIES AND NOVEL POLYMERS ARE ALSO DISCLOSED.
Inventors
- 👤 David Philip Brust
- 👤 Louis Morton Minsk
- 👤 Edward Peter Abel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:25
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/58
Claims Analysis
Total Claims: 0
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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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |