Patent US5223762A successfully refreshed from Google Patents.
US3237286A
Expired / Lapsed
US
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Method of making electrical resistors
Assignee: International Resistance Co
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Filing: 1962-11-28
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Granted: 1966-03-01
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Expires: 1982-11-28
Abstract
No abstract record available.
Inventors
- 👤 Jr William F Ebling
- 👤 Cornelius Y D Huang
- 👤 Tony M Immediata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:45
CPC Classifications
H; H01; H01C; H01C1/00; H01C1/14; H01C1/144; H01C7/00; H01C7/001; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49098; Y10T29/49101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A METHOD OF MAKING AN ELECTRICAL RESISTOR COMPRISING THE STEPS OF FORMING A COMPRESSED BODY OF A MIXTURE OF PARTICLES OF AN ELECTRICALLY CONDUCTIVE MATERIAL AND AN INSULATING CERAMIC MATERIAL, FIRING SAID BODY, THEN CONTACTING A SURFACE OF SAID BODY WITH AN ETCHING MATERIAL WHICH ATTACTS THE CERAMIC MATERIAL BUT NOT THE CONDUCTIVE PARTICLES SO AS TO REMOVE SOME OF THE CERAMIC MATERIAL TO FORM POCKETS IN SAID SURFACE OF THE BODY AND EXPOSE THE SURFACES OF THE CONDUCTIVE PARTICLES AT SAID SURFACE OF THE BODY, THAN COATING SAID SURFACE OF THE BODY WITH A LAYER OF AN ELECTRICALLY CONDUCTIVE METAL SO AS TO FILL SAID POCKETS WITH SAID METAL, AND THEN SECURING A TERMINAL WIRE TO SAID METAL LAYER.
Claim 2
Independent Claim
120 words
A METHOD OF MAKING AN ELECTRICAL RESISTOR COMPRISING THE STEPS OF FORMING A COMPRESSED BODY OF A MIXTURE OF PARTICLES OF AN ELECTRICALLY CONDUCTIVE MATERIAL AND AN INSULATING CERAMIC MATERIAL, FIRING SAID BODY, THEN CONTACTING A SURFACE OF SAID BODY WITH AN ETCHING MATERIAL WHICH ATTACTS THE CERAMIC MATERIAL BUT NOT THE CONDUCTIVE PARTICLES SO AS TO REMOVE SOME OF THE CERAMIC MATERIAL TO FORM POCKETS IN SAID SURFACE OF THE BODY AND EXPOSE THE SURFACES OF THE CONDUCTIVE PARTICLES AT SAID SURFACE OF THE BODY, THAN COATING SAID SURFACE OF THE BODY WITH A LAYER OF AN ELECTRICALLY CONDUCTIVE METAL SO AS TO FILL SAID POCKETS WITH SAID METAL, AND THEN SECURING A TERMINAL WIRE TO SAID METAL LAYER.
References Cited (Backward Citations)
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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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |