US2915730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical resistor and method
Assignee: Corning Glass Works
•
Filing: 1955-09-30
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Granted: 1959-12-01
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Expires: 1975-09-30
Abstract
No abstract record available.
Inventors
- 👤 James K Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:55
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/18; B; B61; B61G; B61G9/00; B61G9/12; C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; H01B; H01B1/00; H01B3/00; H01B3/02; H01B3/08; H01B3/087; H01C1/00; H01C1/02; H01C1/032; H01C7/006; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/211; C03C2217/24; C03C2217/244; C03C2218/00; C03C2218/10; C03C2218/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
AN ELECTRICAL RESISTOR COMPRISING A CERAMIC BODY, AN ADHERENT, ELECTROCONDUCTIVE, METAL OXIDE FILM ON THE SURFACE OF THE CERAMIC BODY, A SECOND ELECTROCONDUCTIVE METAL OXIDE FILM SUPERIMPOSED ON THE FIRST FILM, THE SECOND FILM HAVING A DIFFERENT COMPOSITION FROM AND A HIGHER RESISTANCE THAN THE FIRST FILM, AND SPACED, ELECTRICALLY CONDUCTING TERMINAL MEMBERS IN PHYSICAL CONTACT WITH SAID SECOND FILM AND SPACED FROM SAID FIRST FILM BY SAID SECOND FILM, BUT IN ELECTRICAL CONTACT WITH SAID FIRST FILM THROUGH SAID SECOND FILM.
Claim 2
Dependent Claim
82 words
AN ELECTRICAL RESISTOR COMPRISING A CERAMIC BODY, AN ADHERENT, ELECTROCONDUCTIVE, METAL OXIDE FILM ON THE SURFACE OF THE CERAMIC BODY, A SECOND ELECTROCONDUCTIVE METAL OXIDE FILM SUPERIMPOSED ON THE FIRST FILM, THE SECOND FILM HAVING A DIFFERENT COMPOSITION FROM AND A HIGHER RESISTANCE THAN THE FIRST FILM, AND SPACED, ELECTRICALLY CONDUCTING TERMINAL MEMBERS IN PHYSICAL CONTACT WITH SAID SECOND FILM AND SPACED FROM SAID FIRST FILM BY SAID SECOND FILM, BUT IN ELECTRICAL CONTACT WITH SAID FIRST FILM THROUGH SAID SECOND FILM.
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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) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |