Patent US2883502A successfully refreshed from Google Patents.
US2883502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical resistors and other bodies with negligible temperature coefficient of expansion
Assignee: UNITED STATES GASKET Co
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Filing: 1955-01-28
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Granted: 1959-04-21
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Expires: 1975-01-28
Abstract
No abstract record available.
Inventors
- 👤 Merritt A Rudner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:11
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/06; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/443; H01B3/445; H01C7/001; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
AN ARTICLE OF MANUFACTURE COMPRISING A SOLID BODY FORMED BY A MIXTURE OF POWDERED POLYTETRAFLUOROETHYLENE AND POWDERED HEAT-TREATED LITHIUM ALUMINA SILICATE HAVING A NEGATIVE TEMPERATURE COEFFICIENT OF EXPANSION AND PRESENT IN QUANTITY FROM AT LEAST 10% BY WEIGHT OT ABOUT 90% BY WEIGHT MATERIALLY TO REDUCE THE EFFECT ON SAID BODY OF THE POSITIVE TEMPERATURE COEFFICIENT OF EXPANSION OF SAID POLYTETRAFLUORETHYLENE.
Claim 2
Dependent Claim
61 words
AN ARTICLE OF MANUFACTURE COMPRISING A SOLID BODY FORMED BY A MIXTURE OF POWDERED POLYTETRAFLUOROETHYLENE AND POWDERED HEAT-TREATED LITHIUM ALUMINA SILICATE HAVING A NEGATIVE TEMPERATURE COEFFICIENT OF EXPANSION AND PRESENT IN QUANTITY FROM AT LEAST 10% BY WEIGHT OT ABOUT 90% BY WEIGHT MATERIALLY TO REDUCE THE EFFECT ON SAID BODY OF THE POSITIVE TEMPERATURE COEFFICIENT OF EXPANSION OF SAID POLYTETRAFLUORETHYLENE.
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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) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |