US3248680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistor
Assignee: Ward Leonard Electric Co
•
Filing: 1962-12-11
•
Granted: 1966-04-26
•
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
2026-10-29 20:50
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/02; H01B3/00; H01B3/02; H01B3/08; H01B3/087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
AN ELECTRICAL RESISTOR COMPRISING A RIGID BERYLLIA BASE COMPOSED OF 99 TO 100% BERYLLIUM OXIDE AND HAVING A COEFFICIENT OF EXPANSION OF APPROXIMATELY 9X10**-6 INCHES PER INCH PER DEGREE CENTIGRATE IN THE TEMPERATURE RANGE OF 20 TO 800 DEGREES CENTIGRADE, TERMINAL MEANS ON SAID BASE AND A WOUND RESISTIVE ELEMENT ON SAID BASE AND ENGAGING SAID TERMINAL MEANS, SAID ELEMENT COMPRISING A TITANIUM ALLOY CONTAINING ALUMINUM AND VANADIUM HAVING A COEFFICIENT OF EXPANSION SUBSTANTIALLY THE SAME AS SAID BASE.
Claim 2
Dependent Claim
79 words
AN ELECTRICAL RESISTOR COMPRISING A RIGID BERYLLIA BASE COMPOSED OF 99 TO 100% BERYLLIUM OXIDE AND HAVING A COEFFICIENT OF EXPANSION OF APPROXIMATELY 9X10**-6 INCHES PER INCH PER DEGREE CENTIGRATE IN THE TEMPERATURE RANGE OF 20 TO 800 DEGREES CENTIGRADE, TERMINAL MEANS ON SAID BASE AND A WOUND RESISTIVE ELEMENT ON SAID BASE AND ENGAGING SAID TERMINAL MEANS, SAID ELEMENT COMPRISING A TITANIUM ALLOY CONTAINING ALUMINUM AND VANADIUM HAVING A COEFFICIENT OF EXPANSION SUBSTANTIALLY THE SAME AS SAID BASE.
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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 |