Patent US2603565A successfully refreshed from Google Patents.
US2603565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic film forming image transfer composition
Assignee: Polaroid Corp
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Filing: 1947-02-17
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Granted: 1952-07-15
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Expires: 1967-02-17
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Land
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:40
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/32; G03C8/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PHOTOGRAPHIC PROCESSING LIQUID COMPOSITION FOR FORMING TRANSFER PRINTS OF LATENT IMAGES CONTAINED IN SILVER HALIDE EMULSIONS, WHICH COMPOSITION COMPRISES A SILVER HALIDE DEVELOPER, A SOLVENT INCLUDING WATER FOR SAID DEVELOPER, AN ALKALI, A WATER-SOLUBLE, SILVER HALIDE SOLVENT, AND A WATER-SOLUBLE, FILM-FORMING, HIGH MOLECULAR WEIGHT POLYMER FROM THE CLASS CONSISTING OF THE CARBOXYMETHYL AND HYDROXYETHYL CELLULOSES AND THE SLATS OF POLYACRYLIC AND POLYMETHACRYLIC ACIDS, SAID POLYMER BEING IN THE COMPOSITION IN SUFFICIENT QUANTITY TO IMPART THERETO A VISCOSITY IN EXCESS OF 1,000 CENTIPOISES AT A TEMPERATURE OF APPROXIMATELY 24* C. AND RETAINING ITS VISCOSITY-IMPARTING AND FILM-FORMING PROPERTIES IN THE ALKALINE COMPOSITION.
Claim 2
Dependent Claim
101 words
A PHOTOGRAPHIC PROCESSING LIQUID COMPOSITION FOR FORMING TRANSFER PRINTS OF LATENT IMAGES CONTAINED IN SILVER HALIDE EMULSIONS, WHICH COMPOSITION COMPRISES A SILVER HALIDE DEVELOPER, A SOLVENT INCLUDING WATER FOR SAID DEVELOPER, AN ALKALI, A WATER-SOLUBLE, SILVER HALIDE SOLVENT, AND A WATER-SOLUBLE, FILM-FORMING, HIGH MOLECULAR WEIGHT POLYMER FROM THE CLASS CONSISTING OF THE CARBOXYMETHYL AND HYDROXYETHYL CELLULOSES AND THE SLATS OF POLYACRYLIC AND POLYMETHACRYLIC ACIDS, SAID POLYMER BEING IN THE COMPOSITION IN SUFFICIENT QUANTITY TO IMPART THERETO A VISCOSITY IN EXCESS OF 1,000 CENTIPOISES AT A TEMPERATURE OF APPROXIMATELY 24* C. AND RETAINING ITS VISCOSITY-IMPARTING AND FILM-FORMING PROPERTIES IN THE ALKALINE COMPOSITION.
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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) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |