US2696544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric resistance alloy
Assignee: Driver Harris Co
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Filing: 1951-07-31
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Granted: 1954-12-07
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Expires: 1971-07-31
Abstract
No abstract record available.
Inventors
- 👤 Poch Stephen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:25
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/02; H01B1/026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A WIRE WOUND RESISTOR COMPRISING A CERAMIC BASE AND A RESISTANCE WIRE ON THE BASE CONSISTING ESSENTIALLY OF 50 TO 60 PERCENT COPPER, 1.5 TO 2.5 PERCENT COBALT, BALANCE NICKEL, AND HAVING A TEMPERATURE COEFFICIENT OF ELECTRICAL RESISTANCE BETWEEN -4X10-5 AND +3X10-5 OVER THE RANGE OF TEMPERATURE OF 20* TO 100* C.
Claim 2
Dependent Claim
52 words
A WIRE WOUND RESISTOR COMPRISING A CERAMIC BASE AND A RESISTANCE WIRE ON THE BASE CONSISTING ESSENTIALLY OF 50 TO 60 PERCENT COPPER, 1.5 TO 2.5 PERCENT COBALT, BALANCE NICKEL, AND HAVING A TEMPERATURE COEFFICIENT OF ELECTRICAL RESISTANCE BETWEEN -4X10-5 AND +3X10-5 OVER THE RANGE OF TEMPERATURE OF 20* TO 100* C.
References Cited (Backward Citations)
US2019457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-06 | 1958-06-07 | 1958-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-06 | 1962-06-07 | 1962-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-06 | 1966-06-07 | 1966-12-07 | $7700.00 | Window Closed / Lapsed |