Patent US3238489A successfully refreshed from Google Patents.
US3238489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical resistor
Assignee: Vishay Dale Electronics LLC
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Filing: 1962-06-11
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Granted: 1966-03-01
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Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Bernard F Hay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:09
CPC Classifications
H; H01; H01C; H01C3/00; H01C3/14; H01C3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN AN ELECTRICAL RESISTOR, COMPRISING, A RIGID METALLIC HOUSING, A BORE OF UNIFORM DIAMETER IN SAID HOUSING, A RESISTOR UNIT IN SAID BORE AND HAVING AN ELECTRICAL RESISTANCE ELEMENT ON THE OUTER SURFACE OF A SOLID INSULATIVE CORE, SAID RESISTOR UNIT BEING IN SPACED RELATIONSHIP TO SAID BORE, AND ONLY A SINGLE CASTING MATERIAL IN SAID BORE AND IN DIRECT CONTACT WITH SAID RESISTANCE UNIT, SAID CASTING MATERIAL COMPLETELY FILLING THE SPACE BETWEEN SAID BORE AND SAID RESISTANCE ELEMENT AND BEING COMPRISED OF A SOLIDIFYING CARRIER IMPREGNATED WITH PARTICLES OF BERYLLIA FLOUR WHEREUPON SAID BERYLLIA FLOUR WILL SERVE TO QUICKLY DISSPIPATE HEAT FROM SAID RESISTANCE ELEMENT OUTWARDLY TO SAID HOUSING.
Claim 2
Dependent Claim
110 words
IN AN ELECTRICAL RESISTOR, COMPRISING, A RIGID METALLIC HOUSING, A BORE OF UNIFORM DIAMETER IN SAID HOUSING, A RESISTOR UNIT IN SAID BORE AND HAVING AN ELECTRICAL RESISTANCE ELEMENT ON THE OUTER SURFACE OF A SOLID INSULATIVE CORE, SAID RESISTOR UNIT BEING IN SPACED RELATIONSHIP TO SAID BORE, AND ONLY A SINGLE CASTING MATERIAL IN SAID BORE AND IN DIRECT CONTACT WITH SAID RESISTANCE UNIT, SAID CASTING MATERIAL COMPLETELY FILLING THE SPACE BETWEEN SAID BORE AND SAID RESISTANCE ELEMENT AND BEING COMPRISED OF A SOLIDIFYING CARRIER IMPREGNATED WITH PARTICLES OF BERYLLIA FLOUR WHEREUPON SAID BERYLLIA FLOUR WILL SERVE TO QUICKLY DISSPIPATE HEAT FROM SAID RESISTANCE ELEMENT OUTWARDLY TO SAID HOUSING.
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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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |