US3345172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic processing method utilizing frozen aqueous solutions
Assignee: Polaroid Corp
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Filing: 1964-12-01
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Granted: 1967-10-03
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Expires: 1984-12-01
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Land
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:54
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/32; G03C8/34; G03D; G03D5/00; G03D5/006; G03D5/06; G03D5/067
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
THE METHOD OF TREATING AN EXPOSED PHOTOSENSITIVE IMAGE-RECORDING SHEET WITH AN AQUEOUS LIQUID HAVING SUBSTANTIALLY THE VISCOSITY OF WATER TO PRODUCE A VISIBLE IMAGE IN SAID SHEET, SAID METHOD COMPRISING: RAPIDLY FREEZING A QUANTITY OF SAID AQUEOUS LIQUID CONTAINING REAGENTS CAPABLE OF REACTING WITH DIFFERENTIALLY EXPOSED PHOTOSENSITIVE IMAGE-RECORDING MATERIAL TO PRODUCE A VISIBLE IMAGE, SAID LIQUID BEING FROZEN IN THE FORM OF A SUBSTANTIALLY SOLID BODY HAVING AT LEAST ONE DIMENSION APPROXIMATELY EQUAL TO ONE DIMENSION OF THE SECTION OF SAID SHEET TO BE TREATED; AND WHILE MAINTAINING SAID BODY OF FROZEN LIQUID IN A SUBSTANTIALLY SOLID CONDITION, SUPPORTING SAID BODY IN CONTACT WITH ONE SIDE OF SAID SHEET OVER AN ELONGATED AREA LOCATED ADJACENT AN EDGE OF SAID SECTION AND EXTENDED TO OPPOSITE EDGES OF SAID SECTION; AND SIMULTANEOUSLY PRESSING SAID BODY AGAINST SAID SHEET AND MOVING SAID SHEETD AND BODY RELATIVE TO ONE ANOTHER TRANSVERSELY OF SAID ELONGATED AREA TO CAUSE MELTING OF SAID BODY IN THE REGION OF CONTACT WITH SAID SHEET AND IMPREGNATION OF SAID SHEET WITH SAID LIQUID RESULTING FROM SAID MELTING.
Claim 2
Independent Claim
177 words
THE METHOD OF TREATING AN EXPOSED PHOTOSENSITIVE IMAGE-RECORDING SHEET WITH AN AQUEOUS LIQUID HAVING SUBSTANTIALLY THE VISCOSITY OF WATER TO PRODUCE A VISIBLE IMAGE IN SAID SHEET, SAID METHOD COMPRISING: RAPIDLY FREEZING A QUANTITY OF SAID AQUEOUS LIQUID CONTAINING REAGENTS CAPABLE OF REACTING WITH DIFFERENTIALLY EXPOSED PHOTOSENSITIVE IMAGE-RECORDING MATERIAL TO PRODUCE A VISIBLE IMAGE, SAID LIQUID BEING FROZEN IN THE FORM OF A SUBSTANTIALLY SOLID BODY HAVING AT LEAST ONE DIMENSION APPROXIMATELY EQUAL TO ONE DIMENSION OF THE SECTION OF SAID SHEET TO BE TREATED; AND WHILE MAINTAINING SAID BODY OF FROZEN LIQUID IN A SUBSTANTIALLY SOLID CONDITION, SUPPORTING SAID BODY IN CONTACT WITH ONE SIDE OF SAID SHEET OVER AN ELONGATED AREA LOCATED ADJACENT AN EDGE OF SAID SECTION AND EXTENDED TO OPPOSITE EDGES OF SAID SECTION; AND SIMULTANEOUSLY PRESSING SAID BODY AGAINST SAID SHEET AND MOVING SAID SHEETD AND BODY RELATIVE TO ONE ANOTHER TRANSVERSELY OF SAID ELONGATED AREA TO CAUSE MELTING OF SAID BODY IN THE REGION OF CONTACT WITH SAID SHEET AND IMPREGNATION OF SAID SHEET WITH SAID LIQUID RESULTING FROM SAID MELTING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |