US3239652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically-heated paper drying drum
Assignee: Individual
•
Filing: 1963-07-09
•
Granted: 1966-03-08
•
Expires: 1983-07-09
Abstract
No abstract record available.
Inventors
- 👤 Price Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:42
CPC Classifications
D; D21; D21F; D21F5/00; D21F5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
APPARATUS FOR DRYING WET SHEET PAPER, SAID APPARATUS COMPRISING, IN COMBINATION, A ROTATABLE DRUM HAVING A SMOOTH, SUBSTANTIALLY CONTINUOUS EXTERNAL SURFACE MEMBER OF ELECTRICALLY INSULATING MATERIAL, SAID MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF GLASS AND CERAMIC MATERIALS, A PLURALITY OF ELECTRICAL HEATING CONDUCTORS IMBEDDED IN, SURROUNDED BY, AND SEPARATED FROM ONE ANOTHER BY SAID MATERIAL IN SAID SURFACE MEMBER, MEANS FOR CONDUCTING ELECTRICAL ENERGY FROM A SOURCE OF ELECTRICAL ENERGY THROUGH EACH OF SAID CONDUCTORS, AND MEANS FOR ROTATABLY MOUNTING SAID DRUM AND ROTATING SAID DRUM IN RESPONSE TO THE OUTPUT OF A ROTARY DRIVE POWER SOURCE.
Claim 2
Dependent Claim
99 words
APPARATUS FOR DRYING WET SHEET PAPER, SAID APPARATUS COMPRISING, IN COMBINATION, A ROTATABLE DRUM HAVING A SMOOTH, SUBSTANTIALLY CONTINUOUS EXTERNAL SURFACE MEMBER OF ELECTRICALLY INSULATING MATERIAL, SAID MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF GLASS AND CERAMIC MATERIALS, A PLURALITY OF ELECTRICAL HEATING CONDUCTORS IMBEDDED IN, SURROUNDED BY, AND SEPARATED FROM ONE ANOTHER BY SAID MATERIAL IN SAID SURFACE MEMBER, MEANS FOR CONDUCTING ELECTRICAL ENERGY FROM A SOURCE OF ELECTRICAL ENERGY THROUGH EACH OF SAID CONDUCTORS, AND MEANS FOR ROTATABLY MOUNTING SAID DRUM AND ROTATING SAID DRUM IN RESPONSE TO THE OUTPUT OF A ROTARY DRIVE POWER SOURCE.
References Cited (Backward Citations)
US1433674A
Cited
US1497223A
Cited
US1955508A
Cited
US2038607A
Cited
DE631618C
Cited
DE693659C
Cited
US2150929A
Cited
US2326044A
Cited
US2430920A
Cited
US2409244A
Cited
US2526906A
Cited
US2622038A
Cited
US2552259A
Cited
US2680468A
Cited
US2700094A
Cited
US2679572A
Cited
US2831097A
Cited
FR1157100A
Cited
US2870312A
Cited
DE1110777B
Cited
US3012141A
Cited
US3169729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |