US3294947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for thermal development of photographic materials
Assignee: GAF Chemicals Corp
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Filing: 1965-12-10
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Granted: 1966-12-27
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Expires: 1985-12-10
Abstract
No abstract record available.
Inventors
- 👤 John H Whitmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:37
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/002; H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/14; H05B6/145
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
APPARATUS FOR HEATING NON-ELECTRICALY CONDUCTIVE SHEET MATERIAL COMPRISING, IN COMBAINTION, A ROTATABLE HOLLOW CYLINDER OF HIGH CONDUCTIVITY FOR HEAT AND ELECTRICITY, GUIDE ROLLERS SUPPORTING SAID CYLINDER FOR ROTATION ABOUT ITS AXIS, AN ELONGATED MAGNETIC FLUX-GENERATING ELEMENT GENERALLY CO-AXIAL WITH SAID CYLINDER OCCUPYING A MAJOR PORTION OF THE CROSS SECTIONAL AREA WITHIN SAID CYLINDER AND BEING SUFFICIENT TO INDUCE IN SAID CYLINDER A RELATIVELY HEAVY ELECTRIC CURRENT, AND A GUIDE BELT EXTENDING AROUND AND IN CONTACT WITH SUBSTANTIALLY THE ENTIRE PERIPHERY OF SAID HOLLOW CYLINDER, ADAPTED TO TRAVEL THEREWITH FOR SUPPORTING SAID SHEET MATERIAL IN SURFACE CONTACT WITH OUTER SURFACE OF SAID CYLINDER AROUND SUBSTANTIALLY ITS ENTIRE PERIPHERY.
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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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |