US2633423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiabrasion coatings for gelatino silver halide emulsion layers consisting of resins obtained by condensing 5-substituted hydantions with formaldehyde
Assignee: GAF Chemicals Corp
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Filing: 1950-12-01
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Granted: 1953-03-31
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Expires: 1970-12-01
Abstract
No abstract record available.
Inventors
- 👤 Bowman M Bower
- 👤 William R Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:22
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/7614; Y; Y10; Y10S; Y10S430/00; Y10S430/162
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A LIGHT SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A BASE AND A GELATINO SILVER HALIDE EMULSION LAYER, SAID LAYER COATED WITH AN ANTI-ABRASION COATING CONSISTING OF THE ADDITION PRODUCT OF FORMALDEHYDE AND 5-SUBSTITUTED HYDANTOIN SELECTED FROM THE CLASS CONSISTING OF THOSE HAVING THE FOLLOWING FORMULAE:
Claim 2
Dependent Claim
43 words
A LIGHT SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A BASE AND A GELATINO SILVER HALIDE EMULSION LAYER, SAID LAYER COATED WITH AN ANTI-ABRASION COATING CONSISTING OF THE ADDITION PRODUCT OF FORMALDEHYDE AND 5-SUBSTITUTED HYDANTOIN SELECTED FROM THE CLASS CONSISTING OF THOSE HAVING THE FOLLOWING FORMULAE:
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) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |