US3189459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic composition containing epoxy hardening agents
Assignee: Eastman Kodak Co
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Filing: 1962-12-17
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Granted: 1965-06-15
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Expires: 1982-12-17
Abstract
No abstract record available.
Inventors
- 👤 Donald M Burness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:16
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/10; C08G59/18; C08G59/20; C08G59/22; C08G59/28; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30; G03C1/306
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PHOTOGRAPHIC ELEMENT COMPRISING A LAYER WHICH CONTAINS CELLULOSE ETHER PHTHALATE HAVING A PHTHALYL CONTENT OF AT LEAST 20% BY WEIGHT AND AS A HARDENER THEREFOR, A QUATERNARY AMMONIUM SALT CONTAINING AT LEAST TWO OXIRANE RINGS SEPARATED FROM THE QUATERNARY NITROGEN BY A SINGLE CARBON ATOM.
Claim 2
Dependent Claim
46 words
A PHOTOGRAPHIC ELEMENT COMPRISING A LAYER WHICH CONTAINS CELLULOSE ETHER PHTHALATE HAVING A PHTHALYL CONTENT OF AT LEAST 20% BY WEIGHT AND AS A HARDENER THEREFOR, A QUATERNARY AMMONIUM SALT CONTAINING AT LEAST TWO OXIRANE RINGS SEPARATED FROM THE QUATERNARY NITROGEN BY A SINGLE CARBON ATOM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |