US2831768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric light-sensitive photographic elements
Assignee: Eastman Kodak Co
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Filing: 1956-01-19
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Granted: 1958-04-22
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Expires: 1976-01-19
Abstract
No abstract record available.
Inventors
- 👤 Stewart H Merrill
- 👤 Cornelius C Unruh
- 👤 Earl M Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:39
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/031; G03F7/038; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/109
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON A LIGHT-SENSITIVE LAYER OF A MIXTURE OF (1) A MEMBER OF THE CLASS CONSISTING OF 12-HYDROXYSTEARIC ACID, ETHYL 12-HYDROXYSTEARATE, P,P''-DIMETHYLAMINOBENZHYDROL, AND BORNEOL, AND (2) A LIGHT-SENSATIVE FILM-FORMING POLYMER SELECTED FROM THE CLASS CONSISTING OF POLYVINYL BENZOPHENONE, POLYVINYL-P-CHLOROBENZOPHENONE, POLYVINYL-P-METHOXYBENZOPHENONE, POLYVINYL-B-NAPHTHOPHENONE, POLYVINLY - O - CARBOXYBENZOPHENONE, ADDITION PRODUCT OF 4(B-HYDROXYETHOXY)BENZOPHENONE TO STYRENEMALEIC ANHYDRIDE HETERPOLYMER, P-BENXOYLPHENOXYACETATE OF POLYVINYL ALCOHOL AND P-BENZOYLPHENOXYACERATE OF PARTIALLY HYDROXYLSED CELLULOSE ACETATE.
Claim 2
Dependent Claim
71 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON A LIGHT-SENSITIVE LAYER OF A MIXTURE OF (1) A MEMBER OF THE CLASS CONSISTING OF 12-HYDROXYSTEARIC ACID, ETHYL 12-HYDROXYSTEARATE, P,P''-DIMETHYLAMINOBENZHYDROL, AND BORNEOL, AND (2) A LIGHT-SENSATIVE FILM-FORMING POLYMER SELECTED FROM THE CLASS CONSISTING OF POLYVINYL BENZOPHENONE, POLYVINYL-P-CHLOROBENZOPHENONE, POLYVINYL-P-METHOXYBENZOPHENONE, POLYVINYL-B-NAPHTHOPHENONE, POLYVINLY - O - CARBOXYBENZOPHENONE, ADDITION PRODUCT OF 4(B-HYDROXYETHOXY)BENZOPHENONE TO STYRENEMALEIC ANHYDRIDE HETERPOLYMER, P-BENXOYLPHENOXYACETATE OF POLYVINYL ALCOHOL AND P-BENZOYLPHENOXYACERATE OF PARTIALLY HYDROXYLSED CELLULOSE ACETATE.
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) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |