US3732099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature sensitive pressure-applying members for a photographic processing liquid
Assignee: Polaroid Corp
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Filing: 1970-12-30
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Granted: 1973-05-08
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Expires: 1990-12-30
Abstract
Abstract A PHOTOGRAPHIC PROCESS, IN WHICH A VISCOUS PHOTOGRAPHIC, PROCESSING LIQUID IS DISBRIBUTED IN A THIN LAYER BETWEEN AN EXPOSED PHOTOSENSITIVE ELEMENT AND ANOTHER ELEMENT BY MOVING THE ELEMENTS IN SUPER-POSITION THROUGH A CONVERGENT PASSAGE BETWEEN A PAIR OF JUXTAPOSED PRESSURE-APPLYING MEMBERS. THE VISCOSITY OF THE LIQUID VARIES INVERSELY WITH TEMPERATURE, THE SPEED OF MOVEMENT OF THE ELEMENTS IS CONSTANT AND THE PRESSURE-APPLYING MEMBERS ARE BIASED TOWARD ONE ANOTHER WITH A FORCE THAT IS VARIED IN INVERSE RELATION TO THE AMBIENT TEMPERATURE TO INSURE UNIFORM LIQIUD DISTRIBUTION DESPITE TEMPERATURE CHANGES. D R A W I N G
Inventors
- 👤 R Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:05
CPC Classifications
G; G03; G03D; G03D9/00; G03D9/02; G03D9/025; G03B; G03B17/00; G03B17/28; G03B17/32; G03B17/34; G03B17/48; G03B17/50; G03B17/52; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/42
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |