US2984565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic process and composition
Assignee: Polaroid Corp
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Filing: 1960-03-18
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Granted: 1961-05-16
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Expires: 1980-03-18
Abstract
No abstract record available.
Inventors
- 👤 Meroe M Morse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:41
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/243; Y; Y10; Y10S; Y10S430/00; Y10S430/166
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
121 words
A PHOTOGRAPHIC PROCESS FOR PRODUCING A VISIBLE PRINT, SAID PROCESS COMPRISING THE STEPS OF APPLYING A PROCESSING LIQUID TO AN EXPOSED SILVER HALIDE EMULSION AND EFFECTING DEVELOPMENT OF SAID EXPOSED SILVER HALIDE BY A SILVER HALIDE DEVELOPING AGENT, REACTING A SILVER HALIDE SOLVENT WITH AT LEAST A PORTION OF THE UNEXPOSED SILVER HALIDE TO FORM A SOLUBLE SILVER COMPLEX, AND TRANSFERRING SAID SOLUBLE SILVER COMPLEX TO A SILVER-RECEPTIVE STRATUM IN SUPERPOSED RELATIONSHIP WITH SAID SILVER HALIDE EMULSION, SAID SILVER-RECEPTIVE STRATUM CONTAINING A SILVER PRECIPITATING AGENT WHEREBY SAID TRANSFERRED SILVER COMPLEX IS PRECIPITATED TO FORM SAID VISIBLE PRINT, SAID PROCESS BEING EFFECTED IN THE PRESENCE OF CYSTEINE IN A CONCENTRATION, BY TOTAL WEIGHT OF SAID PROCESSING LIQUID, OF ABOUT 0.001 TO 0.60%.
References Cited (Backward Citations)
US2449153A
Cited
US2740715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |