Patent US3044968A successfully refreshed from Google Patents.
US3044968A
Expired / Lapsed
US
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Positive temperature coefficient thermistor materials
Assignee: Westinghouse Electric Corp
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Filing: 1958-05-13
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Granted: 1962-07-17
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Expires: 1978-05-13
Abstract
No abstract record available.
Inventors
- 👤 Ichikawa Yoshio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:56
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/02; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; H01C1/00; H01C1/14; H01C1/1406; H01C7/022; H01C7/023; H01C7/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A CERAMIC MEMBER HAVING A MARKED POSITIVE TEMPERATURE COEFFICIENT OF ELECTRICAL RESISTANCE OVER A SELECTED RANGE OF TEMPERATURES, THE MEMBER COMPRISING THE FIRED PRODUCT HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
28 words
A CERAMIC MEMBER HAVING A MARKED POSITIVE TEMPERATURE COEFFICIENT OF ELECTRICAL RESISTANCE OVER A SELECTED RANGE OF TEMPERATURES, THE MEMBER COMPRISING THE FIRED PRODUCT HAVING THE GENERAL FORMULA
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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) | 1965-07-16 | 1966-01-15 | 1966-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-16 | 1970-01-15 | 1970-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-16 | 1974-01-15 | 1974-07-17 | $7700.00 | Window Closed / Lapsed |