US3158447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for drying photographic sheet materials
Assignee: Polaroid Corp
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Filing: 1961-04-27
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Granted: 1964-11-24
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Expires: 1981-04-27
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Sable
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:20
CPC Classifications
G; G03; G03D; G03D15/00; G03D15/02; G03D15/027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
THE METHOD OF DRYING PHOTOGRAPHIC SHEET MATERIALS COMPRISING: (A) PLACING THE SHEET TO BE DRIED WITH ONE SURFACE THEREOF IN SUBSTANTIALLY CONTINUOUS CONTACT WITH A SOLID, HEAT-CONDUCTING PLATE; (B) RADIATING HEAT FROM A HEAT SOURCE TO THE SIDE OF SAID PLATE OPPOSITE THAT SIDE ON WHICH SAID SHEET IS PLACED; (C) HEATING AN AIR SUPPLY BY MEANS OF SAID HEAT SOURCE; AND (D) MOVING SAID AIR SUPPLY, SUBSEQUENT TO HEATING THEREOF, OVER THE OTHER SURFACE OF SAID SHEET, WHEREBY SAID ONE SURFACE OF SAID SHEET RECEIVES HEAT CONDUCTED THROUGH SAID PLATE AND SAID OTHER SURFACE RECEIVES HEAT FROM SAID AIR SUPPLY.
Claim 2
Independent Claim
101 words
THE METHOD OF DRYING PHOTOGRAPHIC SHEET MATERIALS COMPRISING: (A) PLACING THE SHEET TO BE DRIED WITH ONE SURFACE THEREOF IN SUBSTANTIALLY CONTINUOUS CONTACT WITH A SOLID, HEAT-CONDUCTING PLATE; (B) RADIATING HEAT FROM A HEAT SOURCE TO THE SIDE OF SAID PLATE OPPOSITE THAT SIDE ON WHICH SAID SHEET IS PLACED; (C) HEATING AN AIR SUPPLY BY MEANS OF SAID HEAT SOURCE; AND (D) MOVING SAID AIR SUPPLY, SUBSEQUENT TO HEATING THEREOF, OVER THE OTHER SURFACE OF SAID SHEET, WHEREBY SAID ONE SURFACE OF SAID SHEET RECEIVES HEAT CONDUCTED THROUGH SAID PLATE AND SAID OTHER SURFACE RECEIVES HEAT FROM SAID AIR SUPPLY.
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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) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |