Patent US4211967A successfully refreshed from Google Patents.
Patent US3084044A successfully refreshed from Google Patents.
US3084044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrogenous heterocyclic carboxyal-kylmercapto polyoxyalkylene ester photographic sensitizer
Assignee: GAF Chemicals Corp
•
Filing: 1960-12-09
•
Granted: 1963-04-02
•
Expires: 1980-12-09
Abstract
No abstract record available.
Inventors
- 👤 Dersch Fritz
- 👤 Angelus Millet R De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:50
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/52; C07D263/54; C07D263/58; C07D215/00; C07D215/02; C07D215/16; C07D215/36; C07D235/00; C07D235/02; C07D235/04; C07D235/24; C07D235/28; C07D277/00; C07D277/02; C07D277/08; C07D277/12; C07D277/16; C07D277/60; C07D277/62; C07D277/68; C07D277/70; C07D277/74; G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043; G03C5/00; G03C5/26; G03C5/29; G03C5/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A PHOTOGRAPHIC DEVELOPER SOLUTION COMPRISING A SILVER HALIDE DEVELOPING AGENT, AN ALKALI, AN ANTI-OXIDANT AND AN ANTIFOGGANT CONTAINING AS A SPEED-INCREASING AGENT, A WATER-SOLUBLE HETEROCYCLIC POLYOXYALKYLENE COMPOUND HAVING THE FOLLOWING GENERAL FORMULAE:
Claim 2
Dependent Claim
32 words
A PHOTOGRAPHIC DEVELOPER SOLUTION COMPRISING A SILVER HALIDE DEVELOPING AGENT, AN ALKALI, AN ANTI-OXIDANT AND AN ANTIFOGGANT CONTAINING AS A SPEED-INCREASING AGENT, A WATER-SOLUBLE HETEROCYCLIC POLYOXYALKYLENE COMPOUND HAVING THE FOLLOWING GENERAL FORMULAE:
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) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |