Patent US3418912A successfully refreshed from Google Patents.
US3418912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic processing apparatus
Assignee: Polaroid Corp
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Filing: 1966-12-01
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Granted: 1968-12-31
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Expires: 1986-12-01
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Land
- 👤 Richard J Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:08
CPC Classifications
G; G03; G03D; G03D9/00; G03D5/00; G03D5/06; G03D5/067
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
PHOTOGRAPHIC APPARATUS FOR TREATING A PHOTOGRAPHIC SHEET WITH A LIQUID PROCESSING AGENT SUBJECT TO DETERIORATION UPON EXPOSURE TO THE ATMOSPHERE, SAID APPARATUS COMPRISING, IN COMBINATION: AN OPEN CONTAINER FOR HOLDING A QUANTITY OF A PROCESSING LIQUID; A QUANTITY OF A SECOND LIQUID, SUBSTANTIALLY NON-VOLATILE AT NORMAL TEMPERATURES, IMMISCIBLE WITH AND HAVING A SPECIFIC GRAVITY LESS THAN SAID PROCESSING LIQUID, SUFFICIENT TO FORM A LAYER OF PREDETERMINED THICKNESS ON THE ENTIRE SURFACE OF A BODY OF SAID PROCESSING LIQUID WITHIN SAID CONTAINER TO PRECLUDE CONTACT BETWEEN SAID PROCESSING LIQUID DISPOSED WITH A PORTION OF A APPLICATOR MEMBER HAVING AN ENDLESS SURFACE WETTABLE BY SAID PROCESSING LIQUID DISPOSED WITH A PORTION OF SAID ENDLESS SURFACE LOCATED ABOVE SAID SECOND LIQUID AND ANOTHER PORTION OF SAID SURFACE LOCATED WITHIN SAID PROCESSING LIQUID;
Claim 2
Dependent Claim
129 words
PHOTOGRAPHIC APPARATUS FOR TREATING A PHOTOGRAPHIC SHEET WITH A LIQUID PROCESSING AGENT SUBJECT TO DETERIORATION UPON EXPOSURE TO THE ATMOSPHERE, SAID APPARATUS COMPRISING, IN COMBINATION: AN OPEN CONTAINER FOR HOLDING A QUANTITY OF A PROCESSING LIQUID; A QUANTITY OF A SECOND LIQUID, SUBSTANTIALLY NON-VOLATILE AT NORMAL TEMPERATURES, IMMISCIBLE WITH AND HAVING A SPECIFIC GRAVITY LESS THAN SAID PROCESSING LIQUID, SUFFICIENT TO FORM A LAYER OF PREDETERMINED THICKNESS ON THE ENTIRE SURFACE OF A BODY OF SAID PROCESSING LIQUID WITHIN SAID CONTAINER TO PRECLUDE CONTACT BETWEEN SAID PROCESSING LIQUID DISPOSED WITH A PORTION OF A APPLICATOR MEMBER HAVING AN ENDLESS SURFACE WETTABLE BY SAID PROCESSING LIQUID DISPOSED WITH A PORTION OF SAID ENDLESS SURFACE LOCATED ABOVE SAID SECOND LIQUID AND ANOTHER PORTION OF SAID SURFACE LOCATED WITHIN SAID PROCESSING LIQUID;
References Cited (Backward Citations)
US3288609A
Cited
US3379113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |