Patent US3370262A successfully refreshed from Google Patents.
US3370262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical resistor
Assignee: Sprague Electric Co
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Filing: 1963-05-27
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Granted: 1968-02-20
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Expires: 1983-05-27
Abstract
No abstract record available.
Inventors
- 👤 Robert S Marty
- 👤 John H Fabricius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:00
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/18; H01B; H01B1/00; H01C1/00; H01C1/02; H01C1/034; H01C7/006; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099; Y10T29/49117; Y10T29/49169
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN AN ELECTRICAL RESISTOR, AN INERT ELECTRICALLY NONCONDUCTIVE BASE HAVING A COEFFICIENT OF EXPANSION OF OVER 6X10-6CM./CM./*C. OVER A TEMPERATURE RANGE OF FROM 27*C. TO 1100*C., A FIRED-ON CONTINUOUS INORGANIC HOMOGENEOUS ELECTRICAL NON-CONDUCTING FIRST LAYER ON A SURFACE OF SAID BASE HAVING A LOWER TEMPERATURE COEFFICIENT OF EXPANSION THAN SAID BASE, A FIRED-ON ELECTRICALLY RESISTIVE METAL FILM ON SAID FIRST LAYER HAVING A FIRING TEMPERATURE NOT GREATER THAN SAID FIRST LAYER WITH SPACED ELECTRODES IN ELECTRICAL CONNECTION WITH SAID FILM, AND A FIRED-ON CONTINUOUS INORGANIC HOMOGENEOUS ELECTRICALLY NON-CONDUCTING SECOND LAYER OVERLYING SAID FILM AND ADJACENT PORTIONS OF SAID ELECTRODES AND JOINED TO SAID FIRST LAYER IN AREAS OF CONTIGUITY, SAID SECOND LAYER HAVING A FIRING TEMPERATURE NOT GREATER THAN SAID FILM AND A TEMPERATURE COEFFICIENT EXPANSION NOT GREATER THAN FIRST LAYER AND SAID BASE.
Claim 2
Dependent Claim
134 words
IN AN ELECTRICAL RESISTOR, AN INERT ELECTRICALLY NONCONDUCTIVE BASE HAVING A COEFFICIENT OF EXPANSION OF OVER 6X10-6CM./CM./*C. OVER A TEMPERATURE RANGE OF FROM 27*C. TO 1100*C., A FIRED-ON CONTINUOUS INORGANIC HOMOGENEOUS ELECTRICAL NON-CONDUCTING FIRST LAYER ON A SURFACE OF SAID BASE HAVING A LOWER TEMPERATURE COEFFICIENT OF EXPANSION THAN SAID BASE, A FIRED-ON ELECTRICALLY RESISTIVE METAL FILM ON SAID FIRST LAYER HAVING A FIRING TEMPERATURE NOT GREATER THAN SAID FIRST LAYER WITH SPACED ELECTRODES IN ELECTRICAL CONNECTION WITH SAID FILM, AND A FIRED-ON CONTINUOUS INORGANIC HOMOGENEOUS ELECTRICALLY NON-CONDUCTING SECOND LAYER OVERLYING SAID FILM AND ADJACENT PORTIONS OF SAID ELECTRODES AND JOINED TO SAID FIRST LAYER IN AREAS OF CONTIGUITY, SAID SECOND LAYER HAVING A FIRING TEMPERATURE NOT GREATER THAN SAID FILM AND A TEMPERATURE COEFFICIENT EXPANSION NOT GREATER THAN FIRST LAYER AND 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) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |