Patent US5163810A successfully refreshed from Google Patents.
US3243579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal developer
Assignee: Frederick Post Co
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Filing: 1963-08-01
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Granted: 1966-03-29
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Expires: 1983-08-01
Abstract
No abstract record available.
Inventors
- 👤 Victor C Sussin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:04
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN APPARATUS OF THE CLASS DESCRIBED A ROTATABLE CYLINDER ADAPTED TO BE HEATED AND THERMOSTATICALLY CONTROLLED, COMPRISING AN INNER METALLIC CYLINDER, A LAYER OF INSULATING MATERIAL ON THE OUTER SIDE OF SAID CYLINDER, AN INSULATED WINDING OF ELECTRICAL RESISTANCE WIRE AROUND SAID CYLINDER, A THIN-WALLED OUTER METALLIC CYLINDER SNUGLY FITTING OVER SAID WINDING, SAID OUTER CYLINDER HAVING AN APPRECIABLE COEFFICIENT OF EXPANSION, SAID INNER AND OUTER METALLIC CYLINDERS BEING FIXEDLY SECURED TOGETHER AT THEIR FIRST ENDS WITH THEIR SECOND ENDS UNSECURED TO EACH OTHER THEREBY TO PERMIT ONE CYLINDER FREELY TO CHANGE IN LENGTH RELATIVE TO THE OTHER, AN END CLOSURE FOR EACH OF TWO ENDS OF THE OUTER CYLINDER, AND AXIAL MEANS PROJECTING FROM THE END CLOSURES FOR ROTATABLY MOUNTING THE OUTER CYLINDER.
Claim 2
Dependent Claim
124 words
IN APPARATUS OF THE CLASS DESCRIBED A ROTATABLE CYLINDER ADAPTED TO BE HEATED AND THERMOSTATICALLY CONTROLLED, COMPRISING AN INNER METALLIC CYLINDER, A LAYER OF INSULATING MATERIAL ON THE OUTER SIDE OF SAID CYLINDER, AN INSULATED WINDING OF ELECTRICAL RESISTANCE WIRE AROUND SAID CYLINDER, A THIN-WALLED OUTER METALLIC CYLINDER SNUGLY FITTING OVER SAID WINDING, SAID OUTER CYLINDER HAVING AN APPRECIABLE COEFFICIENT OF EXPANSION, SAID INNER AND OUTER METALLIC CYLINDERS BEING FIXEDLY SECURED TOGETHER AT THEIR FIRST ENDS WITH THEIR SECOND ENDS UNSECURED TO EACH OTHER THEREBY TO PERMIT ONE CYLINDER FREELY TO CHANGE IN LENGTH RELATIVE TO THE OTHER, AN END CLOSURE FOR EACH OF TWO ENDS OF THE OUTER CYLINDER, AND AXIAL MEANS PROJECTING FROM THE END CLOSURES FOR ROTATABLY MOUNTING THE OUTER CYLINDER.
References Cited (Backward Citations)
US1612270A
Cited
US1594158A
Cited
US1605027A
Cited
US3027285A
Cited
US3032811A
Cited
US3012141A
Cited
US3176113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |