US2533990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide developer compositions containing polyoxyalkylene ethers of hexitol ring dehydration products
Assignee: EIDP Inc
•
Filing: 1947-06-10
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Granted: 1950-12-12
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Expires: 1967-06-10
Abstract
No abstract record available.
Inventors
- 👤 Blake Ralph Kingsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:39
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305; G03C5/3056; Y; Y10; Y10S; Y10S430/00; Y10S430/135; Y10S430/15; Y10S430/167
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
THE PROCESS OF DEVELOPING A SILVER HALIDE IMAGE WITH A DEVELOPER SOLUTION CONTAINING A PHOTOGRAPHIC SILVER HALIDE DEVELOPING AGENT AND FROM 0.1 TO 2.5 GRAMS OF A POLYXYALKYLENE ETHER OF A HIXITOL RING DEHYDRATION PRODUCT PER LITER OF SOLUTION.
Claim 2
Dependent Claim
39 words
THE PROCESS OF DEVELOPING A SILVER HALIDE IMAGE WITH A DEVELOPER SOLUTION CONTAINING A PHOTOGRAPHIC SILVER HALIDE DEVELOPING AGENT AND FROM 0.1 TO 2.5 GRAMS OF A POLYXYALKYLENE ETHER OF A HIXITOL RING DEHYDRATION PRODUCT PER LITER OF SOLUTION.
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) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |