US2698244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic transfer process utilizing a primary color developer for producing a colored photographic transfer image
Assignee: Polaroid Corp
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Filing: 1953-11-10
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Granted: 1954-12-28
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Expires: 1973-11-10
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Land
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:04
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
A PROCESS OF FORMING POSITIVE TRANSFER IMAGES IN COLOR WHEREIN A SINGLE APPLICATION OF LIQUID TO THE EXPOSED SILVER HALIDE EMULSION OF A PHOTOSENITIVE ELEMENT PORDUCES THE NECESSARY SEQUENCES OF REACTIONS FOR GIVING THE FINISHED POSITIVE PRINT, SAID PROCESS COMPRISING THE STEPS OF: PERMEATING SAID SILVER HALIDE EMULSION WITH A LIQUID COMPOSITION, AND, DURING SAID PERMEATION, HAVING SAID SILVER HALIDE EMULSION SO SUPERPOSED ON AN IMAGE-RECEIVING LAYER THAT SAID LIQUID HAS ACCESS TO THE LATTER LAYER; PROVIDING WITHIN THE LAMINATION COMPRISING SAID PHOTOSENSITIVE ELEMENT AND SAID IMAGE-RECEIVING LAYER A REAGENT CAPABLE OF DEVELOPING EXPOSED SILVER HALIDE TO SILVER AND CAPABLE OF REACTING IN THE PRESENCE OF AN OXIDIZING AGENT TO GIVE A DYE AND COMPRISING A PRIMARY COLOR-FORMING SILVER HALIDE DEVELOPER, SAID REAGENT BEING SO DISTRIBUTED THROUGHOUT SAID LAMINATION AS TO HAVE A SUBSTANTIALLY CONSTANT DEPTHWISE CONCENTRATION PER UNIT SURFACE AREA OF SAID LAMINATION AND BEING PRESENT PER EACH SAID UNIT AREA SUBSTANTIALLY ONLY IN SUCH A QUANTITY AS TO CAUSE SAID REAGENT TO BE SUBSTANTIALLY COMPLETELY REACTED WITHIN THE EMULSION IN THE EVENT OF THE FULL DEVELOPMENT OF THE SILVER HALIDE OF SAID UNIT AREA, SAID REAGENT BEING DISSOLVABLE
Claim 2
Dependent Claim
190 words
A PROCESS OF FORMING POSITIVE TRANSFER IMAGES IN COLOR WHEREIN A SINGLE APPLICATION OF LIQUID TO THE EXPOSED SILVER HALIDE EMULSION OF A PHOTOSENITIVE ELEMENT PORDUCES THE NECESSARY SEQUENCES OF REACTIONS FOR GIVING THE FINISHED POSITIVE PRINT, SAID PROCESS COMPRISING THE STEPS OF: PERMEATING SAID SILVER HALIDE EMULSION WITH A LIQUID COMPOSITION, AND, DURING SAID PERMEATION, HAVING SAID SILVER HALIDE EMULSION SO SUPERPOSED ON AN IMAGE-RECEIVING LAYER THAT SAID LIQUID HAS ACCESS TO THE LATTER LAYER; PROVIDING WITHIN THE LAMINATION COMPRISING SAID PHOTOSENSITIVE ELEMENT AND SAID IMAGE-RECEIVING LAYER A REAGENT CAPABLE OF DEVELOPING EXPOSED SILVER HALIDE TO SILVER AND CAPABLE OF REACTING IN THE PRESENCE OF AN OXIDIZING AGENT TO GIVE A DYE AND COMPRISING A PRIMARY COLOR-FORMING SILVER HALIDE DEVELOPER, SAID REAGENT BEING SO DISTRIBUTED THROUGHOUT SAID LAMINATION AS TO HAVE A SUBSTANTIALLY CONSTANT DEPTHWISE CONCENTRATION PER UNIT SURFACE AREA OF SAID LAMINATION AND BEING PRESENT PER EACH SAID UNIT AREA SUBSTANTIALLY ONLY IN SUCH A QUANTITY AS TO CAUSE SAID REAGENT TO BE SUBSTANTIALLY COMPLETELY REACTED WITHIN THE EMULSION IN THE EVENT OF THE FULL DEVELOPMENT OF THE SILVER HALIDE OF SAID UNIT AREA, SAID REAGENT BEING DISSOLVABLE
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |