Patent US3248679A successfully refreshed from Google Patents.
US3248679A
Expired / Lapsed
US
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Metal alloy resistors
Assignee: Ward Leonard Electric Co
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Filing: 1962-12-11
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Granted: 1966-04-26
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Expires: 1982-12-11
Abstract
No abstract record available.
Inventors
- 👤 Charles J Ganci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:18
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
AN ELECTRICAL RESISTOR COMPRISING AN INSULATING CORE OF CERAMIC COMPOSITION HAVING A COEFFICIENT OF EXPANSION BETWEEN 5 TO 10.5X10**-6 INCHES PER INCH PER DEGREE CENTIGRADE, METAL TERMINALS MOUNTED ON SAID CORE HAVING A COEFFICIENT OF EXPANSION SUBSTANTIALLY EQUAL TO SAID CORE, AND A HELICALLY FORMED ELONGATED RESISTIVE ELEMENT OF TITANIUM ALLOY INCLUDING VANADIUM AND ALUMINUM ON SAID CORE AND IN ENGAGEMENT WITH SAID METAL TERMINALS, SAID ELEMENT HAVING A COEFFICIENT OF EXPANSION OF 9.5 TO 10X10**-6 INCHES PER INCH PER DEGREE CENTIGRADE.
Claim 2
Dependent Claim
82 words
AN ELECTRICAL RESISTOR COMPRISING AN INSULATING CORE OF CERAMIC COMPOSITION HAVING A COEFFICIENT OF EXPANSION BETWEEN 5 TO 10.5X10**-6 INCHES PER INCH PER DEGREE CENTIGRADE, METAL TERMINALS MOUNTED ON SAID CORE HAVING A COEFFICIENT OF EXPANSION SUBSTANTIALLY EQUAL TO SAID CORE, AND A HELICALLY FORMED ELONGATED RESISTIVE ELEMENT OF TITANIUM ALLOY INCLUDING VANADIUM AND ALUMINUM ON SAID CORE AND IN ENGAGEMENT WITH SAID METAL TERMINALS, SAID ELEMENT HAVING A COEFFICIENT OF EXPANSION OF 9.5 TO 10X10**-6 INCHES PER INCH PER DEGREE CENTIGRADE.
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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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |