US3362827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric hardeners for gelatin compositions
Assignee: Individual
•
Filing: 1965-05-24
•
Granted: 1968-01-09
•
Expires: 1985-05-24
Abstract
No abstract record available.
Inventors
- 👤 Oishi Yasushi
- 👤 Nakajima Yosuke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:59
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/06; G03C1/30; G03C1/307
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A METHOD OF PRODUCING A HARDENED GELALTIN LAYER IN A PHOTOGRAPHIC SENSITIVE MATERIAL, WHICH COMPRISES UNIFORMLY MIXING AN AQUEOUS GELATIN DISPERSION OF PH BETWEEN 5 AND 12, PRIOR TO COATING THE DISPERSION UPON A SUPPORT AND DRYING, WITH 0.1 TO 5 PERCENT, BASED ON THE WEIGHT OF THE GELAIN, OF A REACTION PRODUCT OF A POLYMERIC MATERIAL HAVING A MOLECULAR WEIGHT ABOVE 5000 AND CONTAINING MORE THAN 5X10-5 MOLE PER GRAM OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF PRIMARY AND SECONDARY AMINO GROUPS WITH A COMPOUND HAVING THE FOLLOWING FORMULA:
Claim 2
Independent Claim
92 words
A METHOD OF PRODUCING A HARDENED GELALTIN LAYER IN A PHOTOGRAPHIC SENSITIVE MATERIAL, WHICH COMPRISES UNIFORMLY MIXING AN AQUEOUS GELATIN DISPERSION OF PH BETWEEN 5 AND 12, PRIOR TO COATING THE DISPERSION UPON A SUPPORT AND DRYING, WITH 0.1 TO 5 PERCENT, BASED ON THE WEIGHT OF THE GELAIN, OF A REACTION PRODUCT OF A POLYMERIC MATERIAL HAVING A MOLECULAR WEIGHT ABOVE 5000 AND CONTAINING MORE THAN 5X10-5 MOLE PER GRAM OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF PRIMARY AND SECONDARY AMINO GROUPS WITH A COMPOUND HAVING THE FOLLOWING FORMULA:
References Cited (Backward Citations)
US3138461A
Cited
FR1319540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-08 | 1971-07-10 | 1972-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-08 | 1975-07-10 | 1976-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-08 | 1979-07-10 | 1980-01-09 | $7700.00 | Window Closed / Lapsed |