Patent US3249435A successfully refreshed from Google Patents.
US3249435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic products and processes
Assignee: Polaroid Corp
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Filing: 1962-12-28
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Granted: 1966-05-03
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Expires: 1982-12-28
Abstract
No abstract record available.
Inventors
- 👤 Howard G Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:36
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G03C1/8155; G03C8/00; G03C8/32; G03C8/36; G03C8/42; G03C8/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PROCESS FOR APPLYING AN ULTRAVIOLET LIGHT ABSORBER TO A TRANSFER IMAGE IN A DIFFUSION TRANSFER PROCESS, SAID PROCESS COMPRISING THE STEPS OF PERMEATING AN EXPOSED PHOTOSENSITIVE ELEMENT, INCLUDING A SILVER HALIDE EMULSION, WITH A LIQUID PROCESSING COMPOSITION, PROVIDING SAID PROCESSING COMPOSITION WITH AN ULTRAVIOLET LIGHT ABSORBER SOLUBLE THEREIN, DEVELOPING SAID EXPOSED EMULSION AND FORMING, AS A FUNCTION OF DEVELOPMENT, AN IMAGEWISE DISTRIBUTION OF A MOBILE COLOR-PROVIDING SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF DYES AND DYE INTERMEDIATES, AND TRANSFERRING AT LEAST A PORTION OF SAID ULTRAVIOLET LIGHT ABSORBER AND OF SAID MOBILE COLOR-PROVIDING SUBSTANCE TO A SUPERPOSED IMAGE-RECEIVING LAYER, THE AMOUNT OF SAID TRANSFERRED ULTRAVIOLET LIGHT ABSORBER BEING IN A CONCENTRATION EFFECTIVE TO REDUCE FADING OF SAID TRANSFER IMAGE UPON EXPOSURE TO SUNLIGHT.
Claim 2
Dependent Claim
124 words
A PROCESS FOR APPLYING AN ULTRAVIOLET LIGHT ABSORBER TO A TRANSFER IMAGE IN A DIFFUSION TRANSFER PROCESS, SAID PROCESS COMPRISING THE STEPS OF PERMEATING AN EXPOSED PHOTOSENSITIVE ELEMENT, INCLUDING A SILVER HALIDE EMULSION, WITH A LIQUID PROCESSING COMPOSITION, PROVIDING SAID PROCESSING COMPOSITION WITH AN ULTRAVIOLET LIGHT ABSORBER SOLUBLE THEREIN, DEVELOPING SAID EXPOSED EMULSION AND FORMING, AS A FUNCTION OF DEVELOPMENT, AN IMAGEWISE DISTRIBUTION OF A MOBILE COLOR-PROVIDING SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF DYES AND DYE INTERMEDIATES, AND TRANSFERRING AT LEAST A PORTION OF SAID ULTRAVIOLET LIGHT ABSORBER AND OF SAID MOBILE COLOR-PROVIDING SUBSTANCE TO A SUPERPOSED IMAGE-RECEIVING LAYER, THE AMOUNT OF SAID TRANSFERRED ULTRAVIOLET LIGHT ABSORBER BEING IN A CONCENTRATION EFFECTIVE TO REDUCE FADING OF SAID TRANSFER IMAGE UPON EXPOSURE TO SUNLIGHT.
References Cited (Backward Citations)
US3069262A
Cited
US3008995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |