Patent US1331426A successfully refreshed from Google Patents.
Patent US3121011A successfully refreshed from Google Patents.
US3121011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic products and processes
Assignee: Polaroid Corp
•
Filing: 1959-05-25
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Granted: 1964-02-11
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Expires: 1979-05-25
Abstract
No abstract record available.
Inventors
- 👤 Howard C Haas
- 👤 Howard G Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:09
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
THE PROCESS OF FORMING TRANSFER EMAGES IN COLOR WHICH COMPRISES EXPOSING A PHOTOSENSITIVE ELEMENT INCLUDING A SILVER HALIDE EMULSION LAYER AND A POLYMERIC LAYER CONTIGUOUS WITH SAID SILVER HALIDE EMULSION, SAID POLYMERIC LAYER COMPRISING AN ALKALI-PERMEABLE POLYMER AND CONTAINING A DYE DEVELOPER, APPLYING AN AQUEOUS ALKALINE PROCESSING SOLUTON TO SAID PHOTOSENSITIVE ELEMENT, SOLUBILIZING AT LEAST A PORTION OF SAID DYE DEVELOPER FROM SAID POLYMERIC LAYER, DEVELOPING THE EXPOSED EMULSION IN THE PRESENCE OF SAID DYE DEVELOPER WHEREBY SAID DEVELOPER IS IMMOBILIZED IN EXPOSED AREAS BUT IS MOBILE IN UNEXPOSED ARES IN SAID EMULSION AND TRANSFERRING AT LEAST A PORTION OF SAID MOBILE DYE DEVELOPER TO A SUPPERPOSED IMAGE-RECEIVING LAYER TO FORM A POSITIVE IMAGE THEREON, SAID POLYMERIC LAYER COMPRISING A SECOND POLYMER SELECTED FROM THE GROUP CONSISTING OF CELLULOSE NITRATE AND CELLULOSE ACETATE, SAID SECOND POLYMER AND SAID ALKALI-PERMEABLE POLYMER BEING SELECTED FROM THE GROUP CONSISTING OF COPOLYMERS OF VINYL PHTHALIMIDE AND
Claim 2
Dependent Claim
152 words
THE PROCESS OF FORMING TRANSFER EMAGES IN COLOR WHICH COMPRISES EXPOSING A PHOTOSENSITIVE ELEMENT INCLUDING A SILVER HALIDE EMULSION LAYER AND A POLYMERIC LAYER CONTIGUOUS WITH SAID SILVER HALIDE EMULSION, SAID POLYMERIC LAYER COMPRISING AN ALKALI-PERMEABLE POLYMER AND CONTAINING A DYE DEVELOPER, APPLYING AN AQUEOUS ALKALINE PROCESSING SOLUTON TO SAID PHOTOSENSITIVE ELEMENT, SOLUBILIZING AT LEAST A PORTION OF SAID DYE DEVELOPER FROM SAID POLYMERIC LAYER, DEVELOPING THE EXPOSED EMULSION IN THE PRESENCE OF SAID DYE DEVELOPER WHEREBY SAID DEVELOPER IS IMMOBILIZED IN EXPOSED AREAS BUT IS MOBILE IN UNEXPOSED ARES IN SAID EMULSION AND TRANSFERRING AT LEAST A PORTION OF SAID MOBILE DYE DEVELOPER TO A SUPPERPOSED IMAGE-RECEIVING LAYER TO FORM A POSITIVE IMAGE THEREON, SAID POLYMERIC LAYER COMPRISING A SECOND POLYMER SELECTED FROM THE GROUP CONSISTING OF CELLULOSE NITRATE AND CELLULOSE ACETATE, SAID SECOND POLYMER AND SAID ALKALI-PERMEABLE POLYMER BEING SELECTED FROM THE GROUP CONSISTING OF COPOLYMERS OF VINYL PHTHALIMIDE AND
References Cited (Backward Citations)
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Cited
US2267089A
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US2304940A
Cited
US2698798A
Cited
US2992104A
Cited
US2983606A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-10 | 1967-08-12 | 1968-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-10 | 1971-08-12 | 1972-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-10 | 1975-08-12 | 1976-02-11 | $7700.00 | Window Closed / Lapsed |