US3782949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic element comprising a hydroxy substituted aliphatic carboxylic acid aryl hydrazide
Assignee: Eastman Kodak Co
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Filing: 1971-03-11
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Granted: 1974-01-01
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Expires: 1991-03-11
Abstract
Abstract HYDROXY SUBSTITUTED ALIPHATIC CARBOXYLIC ACID ARYL HYDRAZIDES ARE EMPLOYED AS DEVELOPING AGENTS FOR EXPOSED ELECTROMAGNETIC ENERGY SENSITIVE SILVER SALTS. THE DEVELOPING AGENTS CAN BE EMPLOYED IN A DEVELOPER SOLUTIONS, IN SILVER SALT SALTS PROCESSING SOLUTIONS, AS INCORPORATED DEVELOPING AGENTS, AS A DEVELOPING AGENT IN DIFFUSION TRANSFER PROCESSES, AND AS THE REDUCING AGENT IN HEAT PROCESSING TECHNIQUES.
Inventors
- 👤 I Olivares
- 👤 G Haist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:36
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/38; G03C5/383; G03C1/00; G03C1/005; G03C1/06; G03C1/42; G03C1/494; G03C1/498; G03C1/49827; G03C5/29; G03C5/30; G03C5/3014; G03C8/00; G03C8/32; G03C8/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |