Patent US2998394A successfully refreshed from Google Patents.
US2998394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical resistor composition
Assignee: Union Carbide Corp
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Filing: 1960-05-25
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Granted: 1961-08-29
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Expires: 1980-05-25
Abstract
No abstract record available.
Inventors
- 👤 Fedia R Charvat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:16
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
59 words
AS AN ELECTRICAL RESISTOR, A SINTERED MIXTURE CONSISTING ESSENTIALLY OF FROM ABOUT 10 TO ABOUT 60 PERCENT BY VOLUME CLAY WITH THE BALANCE BEING MOLYBDENUM DISILICIDE, SAID CLAY HAVING MAXIMUM SILICA TO ALUMINA RATIO OF ABOUT 2:1 AND CONTAINING UP TO A MAXIMUM OF 0.5 PERCENT BY WEIGHT IN THE AGGREGATE OF OXIDIZABLE MATERIAL, ALUMINATE FORMERS AND SILICATE FORMERS.
Claim 2
Dependent Claim
59 words
AS AN ELECTRICAL RESISTOR, A SINTERED MIXTURE CONSISTING ESSENTIALLY OF FROM ABOUT 10 TO ABOUT 60 PERCENT BY VOLUME CLAY WITH THE BALANCE BEING MOLYBDENUM DISILICIDE, SAID CLAY HAVING MAXIMUM SILICA TO ALUMINA RATIO OF ABOUT 2:1 AND CONTAINING UP TO A MAXIMUM OF 0.5 PERCENT BY WEIGHT IN THE AGGREGATE OF OXIDIZABLE MATERIAL, ALUMINATE FORMERS AND SILICATE FORMERS.
Claim 3
Dependent Claim
12 words
A RESISTOR IN ACCORDANCE WITH CLAIM 1 WHEREIN SAID CLAY IS KAOLIN.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |