US3061434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel substituted silver halide developing agents
Assignee: Polaroid Corp
•
Filing: 1957-08-26
•
Granted: 1962-10-30
•
Expires: 1977-08-26
Abstract
No abstract record available.
Inventors
- 👤 Green Milton
- 👤 Warren E Solodar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:26
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/3021; C; C07; C07C; C07C205/00; C07C205/27; C07C205/35; C07C205/36; C07C205/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A PHOTOGRAPHIC DEVELOPER COMPOSITION COMPRISING AN AQUEOUS ALKALINE SOLUTION OF A FIRST AND A SECOND SILVER AGENT BEING A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
23 words
A PHOTOGRAPHIC DEVELOPER COMPOSITION COMPRISING AN AQUEOUS ALKALINE SOLUTION OF A FIRST AND A SECOND SILVER AGENT BEING A COMPOUND OF THE FORMULA:
References Cited (Backward Citations)
US2698244A
Cited
US2604399A
Cited
US2780647A
Cited
US2751295A
Cited
US2835575A
Cited
US2777879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |