Patent US2063348A successfully refreshed from Google Patents.
Patent US2585596A successfully refreshed from Google Patents.
US2585596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic emulsions containing 2, 5-dimethoxytetrahydrofuran
Assignee: EIDP Inc
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Filing: 1949-12-29
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Granted: 1952-02-12
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Expires: 1969-12-29
Abstract
No abstract record available.
Inventors
- 👤 Stanton William Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:59
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
11 words
A LIGHT-SENSITIVE, GELATINO SILVER-HALIDE EMULSION CONTAINING A SMALL AMOUNT OF 2,5-DIMETHOXYTETRAHYDROFURAN.
Claim 2
Dependent Claim
11 words
A LIGHT-SENSITIVE, GELATINO SILVER-HALIDE EMULSION CONTAINING A SMALL AMOUNT OF 2,5-DIMETHOXYTETRAHYDROFURAN.
Claim 3
Dependent Claim
50 words
A PHOTOGRAPHIC ELEMENT COMPRISING A THIN FLEXIBLE SHEET OF PAPER BEARING AT LEAST ONE LAYER COMPOSED OF A LIGHT-SENSITIVE, GELATINO SILVERHALIDE EMULSION CONTAINING FROM 0.2 TO 3.3 PARTS OF 2,5-DIMETHOXYTETRAHYDROFURAN PER PART OF GELATIN ON A DRY BASIS AND HAVING A THIN GELATIN PROTECTIVE LAYER COATED ON SAID EMULSION LAYER.
Claim 4
Dependent Claim
50 words
A PHOTOGRAPHIC ELEMENT COMPRISING A THIN FLEXIBLE SHEET OF PAPER BEARING AT LEAST ONE LAYER COMPOSED OF A LIGHT-SENSITIVE, GELATINO SILVERHALIDE EMULSION CONTAINING FROM 0.2 TO 3.3 PARTS OF 2,5-DIMETHOXYTETRAHYDROFURAN PER PART OF GELATIN ON A DRY BASIS AND HAVING A THIN GELATIN PROTECTIVE LAYER COATED ON SAID EMULSION LAYER.
References Cited (Backward Citations)
US2172300A
Cited
US2400532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |