Patent US2324672A successfully refreshed from Google Patents.
Patent US2717834A successfully refreshed from Google Patents.
US2717834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographically sensitive elements
Assignee: EIDP Inc
•
Filing: 1952-12-02
•
Granted: 1955-09-13
•
Expires: 1972-12-02
Abstract
No abstract record available.
Inventors
- 👤 Saner William Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:11
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; G03C1/89; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING AT LEAST ONE SILVER HALIDE EMULSION LAYER, SAID ELEMENT HAVING IN AT LEAST ONE OUTER STRATUM THEREOF, A POLYMERIC SALT OF A POLYMER TAKEN FROM THE GROUP CONSISTING OF POLYMERS OF ALPHA-, BETA- AND GAMMA-VINYLPYRIDINE AND THEIR HOMOLOGUES WHICH HAVE AN ALKYL RADICAL OF 1 TO 4 CARBONS ATTACHED TO A CARBON ATOM IN THE PYRIDINE RING WITH AN ANIONIC SOAP-FORMING ACID OF HIGH MOLECULAR WEIGHT TAKEN FROM THE GROUP CONSISTING OF ALKANE CARBOXYLIC, ALKANE SULFONIC AND ALKANE SULFURIC ACIDS OF 10
Claim 2
Dependent Claim
89 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING AT LEAST ONE SILVER HALIDE EMULSION LAYER, SAID ELEMENT HAVING IN AT LEAST ONE OUTER STRATUM THEREOF, A POLYMERIC SALT OF A POLYMER TAKEN FROM THE GROUP CONSISTING OF POLYMERS OF ALPHA-, BETA- AND GAMMA-VINYLPYRIDINE AND THEIR HOMOLOGUES WHICH HAVE AN ALKYL RADICAL OF 1 TO 4 CARBONS ATTACHED TO A CARBON ATOM IN THE PYRIDINE RING WITH AN ANIONIC SOAP-FORMING ACID OF HIGH MOLECULAR WEIGHT TAKEN FROM THE GROUP CONSISTING OF ALKANE CARBOXYLIC, ALKANE SULFONIC AND ALKANE SULFURIC ACIDS OF 10
References Cited (Backward Citations)
US2612446A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-12 | 1959-03-14 | 1959-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-12 | 1963-03-14 | 1963-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-12 | 1967-03-14 | 1967-09-13 | $7700.00 | Window Closed / Lapsed |