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US3207604A
Expired / Lapsed
US
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Hardening photographic silver halide emulsions
Assignee: GAF Chemicals Corp
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Filing: 1962-01-11
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Granted: 1965-09-21
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Expires: 1982-01-11
Abstract
No abstract record available.
Inventors
- 👤 Emil B Rauch
- 👤 Mizianty Michael
- 👤 Dersch Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:47
CPC Classifications
C; C07; C07D; C07D235/00; C07D235/02; C07D235/04; C07D235/24; C07D235/26; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A PHOTOSENSITIVE ELEMENT COMPRISING A SUPPORT AND A GELATIN SILVER HALIDE EMULSION COATED THEREON, SAID EMULSION CONTAINING AS A HARDENING AGENT AN IMIDAZOLONE OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
27 words
A PHOTOSENSITIVE ELEMENT COMPRISING A SUPPORT AND A GELATIN SILVER HALIDE EMULSION COATED THEREON, SAID EMULSION CONTAINING AS A HARDENING AGENT AN IMIDAZOLONE OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2154895A
Cited
US2732316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |