US2551133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic light-sensitive diazo element
Assignee: EIDP Inc
•
Filing: 1946-08-29
•
Granted: 1951-05-01
•
Expires: 1966-08-29
Abstract
No abstract record available.
Inventors
- 👤 Jennings Andrew Bradshaw
- 👤 Murray Otis Willard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:56
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT BEARING AT LEAST ONE LAYER COMPOSED OF A HYDROPHILIC POLYMERIC COLOR FORMER HAVING LIGHT-SENSITIVE DIAZONIUM COMPOUNDS UNIFORMLY DISPERSED THERETHROUGH, SAID COLOR FORMER CONTAINING A MULTIPLICITY OF RECURRING ACTIVE GROUPS WHICH HAVE A STRUCTURE REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
42 words
PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT BEARING AT LEAST ONE LAYER COMPOSED OF A HYDROPHILIC POLYMERIC COLOR FORMER HAVING LIGHT-SENSITIVE DIAZONIUM COMPOUNDS UNIFORMLY DISPERSED THERETHROUGH, SAID COLOR FORMER CONTAINING A MULTIPLICITY OF RECURRING ACTIVE GROUPS WHICH HAVE A STRUCTURE REPRESENTED BY THE FORMULA
References Cited (Backward Citations)
US1444469A
Cited
US1756400A
Cited
US2310943A
Cited
DE700252C
Cited
US2318352A
Cited
US2320422A
Cited
US2282001A
Cited
US2297732A
Cited
US2342620A
Cited
US2397864A
Cited
US2397865A
Cited
US2397866A
Cited
US2415382A
Cited
US2415381A
Cited
US2423460A
Cited
US2397867A
Cited
US2405523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |