Patent US2606834A successfully refreshed from Google Patents.
US2606834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic elements with lightfiltering layers
Assignee: EIDP Inc
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Filing: 1949-07-19
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Granted: 1952-08-12
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Expires: 1969-07-19
Abstract
No abstract record available.
Inventors
- 👤 Saner William Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:12
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/835
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT AT LEAST ONE LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER AND A LIGHT-FILTERING LAYER COMPRISING A SALT OF A VINYLPYRIDINE POLYMER WHICH IS INSOLUBLE IN WATER BUT SOLUBLE IN 1% AQUEOUS ACETIC ACID WITH AN ACID DYE, SAID DYE BEING AB-
Claim 2
Dependent Claim
45 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT AT LEAST ONE LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER AND A LIGHT-FILTERING LAYER COMPRISING A SALT OF A VINYLPYRIDINE POLYMER WHICH IS INSOLUBLE IN WATER BUT SOLUBLE IN 1% AQUEOUS ACETIC ACID WITH AN ACID DYE, SAID DYE BEING AB-
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) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |