US2992105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic diffusion transfer reversal processes
Assignee: Polaroid Corp
•
Filing: 1958-06-23
•
Granted: 1961-07-11
•
Expires: 1978-06-23
Abstract
No abstract record available.
Inventors
- 👤 Richard S Corley
- 👤 Green Milton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:37
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
IN A PROCESS OF FORMING PHOTOGRAPHIC IMAGES IN COLOR, THE STEPS WHICH COMPRISES DEVELOPING A LATENT IMAGE CONTAINED IN AN EXPOSED SILVER HALIDE EMULSION WITH AN AQUEOUS ALKALINE SOLUTION CONTAINING A LEUCTO DEVELOPING AGENT OF THE FORMULA:
Claim 2
Dependent Claim
37 words
IN A PROCESS OF FORMING PHOTOGRAPHIC IMAGES IN COLOR, THE STEPS WHICH COMPRISES DEVELOPING A LATENT IMAGE CONTAINED IN AN EXPOSED SILVER HALIDE EMULSION WITH AN AQUEOUS ALKALINE SOLUTION CONTAINING A LEUCTO DEVELOPING AGENT OF THE FORMULA:
References Cited (Backward Citations)
GB498869A
Cited
US2698244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |