US2764510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon deposited resistor and method of making the same
Assignee: International Resistance Co
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Filing: 1953-01-12
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Granted: 1956-09-25
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Expires: 1973-01-12
Abstract
No abstract record available.
Inventors
- 👤 Jr George W Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:22
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/20; H01B; H01B1/00; H01B1/20; H01B1/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
71 words
IN A PROCESS FOR THE PRODUCTION OF RESISTORS BY PYROLYTIC DEPOSITION IN WHICH BLANKS ARE HEATED IN THE PRESENCE OF A GASEOUS ATMOSPHERE, THE STEPS OF HEATING THE BLANKS IN THE PRESENCE OF HYDROCARBON AND BORON GASES TO DEPOSIT BY PYROLYSIS A COATING OF BORON-CARBON THEREON, AND THEREAFTER HEATING THE BLANKS IN THE PRESENCE OF A HYDROCARBON GAS TO DEPOSIT BY PYROLYSIS A COATING OF PURE CARBON ON SAID BORON-CARBON COATING.
References Cited (Backward Citations)
US1019391A
Cited
US2671735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |