US2882152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed developers
Assignee: Individual
•
Filing: 1957-06-21
•
Granted: 1959-04-14
•
Expires: 1977-06-21
Abstract
No abstract record available.
Inventors
- 👤 Malon H Dickerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:59
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
AN ALKALINE PHOTOGRAPHIC DEVELOPER FOR SILVER EMULSIONS COMPRISING DEVELOPING SOLUTION HAVING THE FOLLOWING FORMULA: AND AN ADDITIVE COMPRISING 0.5 TO 5.0 MILLILITERS OF A MIXTURE COMPRISING 10 GRAMS OF HYDRAZINE AND 90 GRAMS OF TRIETHANOLAMINE.
Claim 2
Dependent Claim
35 words
AN ALKALINE PHOTOGRAPHIC DEVELOPER FOR SILVER EMULSIONS COMPRISING DEVELOPING SOLUTION HAVING THE FOLLOWING FORMULA: AND AN ADDITIVE COMPRISING 0.5 TO 5.0 MILLILITERS OF A MIXTURE COMPRISING 10 GRAMS OF HYDRAZINE AND 90 GRAMS OF TRIETHANOLAMINE.
References Cited (Backward Citations)
US1925557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |