US2644753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo dyes and their use in color
Assignee: —
•
Filing: 1948-11-05
•
Granted: 1953-07-07
•
Expires: 1968-11-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:06
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/28; G03C7/29; Y; Y10; Y10S; Y10S534/00; Y10S534/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A PHOTOGRAPHIC MATERIAL INCLUDING A SILVER CONTAINING IMAGE FORMING LAYER AND A COLLOID COMPRISING AN AZO DYE COMPRISING AT LEAST ONE RADICAL OF THE FORMULA
Claim 2
Dependent Claim
25 words
A PHOTOGRAPHIC MATERIAL INCLUDING A SILVER CONTAINING IMAGE FORMING LAYER AND A COLLOID COMPRISING AN AZO DYE COMPRISING AT LEAST ONE RADICAL OF THE FORMULA
References Cited (Backward Citations)
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Cited
GB503752A
Cited
US2182348A
Cited
US2361541A
Cited
US2470769A
Cited
US2376822A
Cited
US2463838A
Cited
GB607792A
Cited
GB617115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |