US2612448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic elements containing azo dyes and process using them
Assignee: GASPAR
•
Filing: 1948-04-02
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Granted: 1952-09-30
•
Expires: 1968-04-02
Abstract
No abstract record available.
Inventors
- 👤 Gaspar Bela
- 👤 Dreyfuss Paul Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:01
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/28; G03C7/29; C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/04; G03C1/00; G03C1/76; G03C1/825; G03C1/83; G03C1/831
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
A PHOTOGRAPHIC MATERIAL HAVING AT LEAST ONE LIGHT SENSITIVE SILVER HALIDE LAYER, COMPRISING A COLLOID LAYER DYED WITH A DYE HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
24 words
A PHOTOGRAPHIC MATERIAL HAVING AT LEAST ONE LIGHT SENSITIVE SILVER HALIDE LAYER, COMPRISING A COLLOID LAYER DYED WITH A DYE HAVING THE GENERAL FORMULA
Claim 3
Dependent Claim
25 words
A PROCESS FOR PRODUCING A DYE IMAGE IN A PHOTOGRAPHIC LAYER CONTAINING A METALLIC SILVER IMAGE AND DYED WITH A DYE OF THE GENERAL FORMULA
Claim 4
Dependent Claim
25 words
A PROCESS FOR PRODUCING A DYE IMAGE IN A PHOTOGRAPHIC LAYER CONTAINING A METALLIC SILVER IMAGE AND DYED WITH A DYE OF THE GENERAL FORMULA
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US2470769A
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GB551500A
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US2420631A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |