US3249434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering processed photographic sheet material
Assignee: Polaroid Corp
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Filing: 1961-03-16
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Granted: 1966-05-03
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Expires: 1981-03-16
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Land
- 👤 Murry N Fairbank
- 👤 Jr William J Mccune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:33
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/48; G03B17/50; G03B17/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PHOTOGRAPHIC PROCESS COMPRISING THE STEPS OF SUPERPOSING AN EXPOSED PHOTOSENSITIVE STRIP AND ANOTHER STRIP WITH A THIN LAYER OF PROCESSING FLUID SUPERPOSED THEREBETWEEN, MAINTAINING SAID STRIPS IN SUPERPOSED RELATION FOR A PREDETERMINED PERIOD, SEPARATING SAID STRIPS UPON TERMINATION OF SAID PREDETERMINED PROCESSING PERIOD, SUPERPOSING AN INTERLEAF STRIP WITH SAID PHOTOSENSITIVE STRIP FOLLOWING SEPARATION OF SAID PHOTOSENSITIVE AND OTHER STRIPS, AND TAKING UP SAID SUPERPOSED INTERLEAF AND PHOTOSENSITIVE STRIPS ON A STORAGE NUMBER, SAID INTERLEAF STRIP BEING SUBSTANTIALLY NONADHERENT TO SAID PROCESSING FLUID AND TO SAID PHOTOSENSITIVE STRIP AND COMPRISING POLYETHYLENE TEREPHTHALATE.
Claim 2
Dependent Claim
92 words
A PHOTOGRAPHIC PROCESS COMPRISING THE STEPS OF SUPERPOSING AN EXPOSED PHOTOSENSITIVE STRIP AND ANOTHER STRIP WITH A THIN LAYER OF PROCESSING FLUID SUPERPOSED THEREBETWEEN, MAINTAINING SAID STRIPS IN SUPERPOSED RELATION FOR A PREDETERMINED PERIOD, SEPARATING SAID STRIPS UPON TERMINATION OF SAID PREDETERMINED PROCESSING PERIOD, SUPERPOSING AN INTERLEAF STRIP WITH SAID PHOTOSENSITIVE STRIP FOLLOWING SEPARATION OF SAID PHOTOSENSITIVE AND OTHER STRIPS, AND TAKING UP SAID SUPERPOSED INTERLEAF AND PHOTOSENSITIVE STRIPS ON A STORAGE NUMBER, SAID INTERLEAF STRIP BEING SUBSTANTIALLY NONADHERENT TO SAID PROCESSING FLUID AND TO SAID PHOTOSENSITIVE STRIP AND COMPRISING POLYETHYLENE TEREPHTHALATE.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |