US2941962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon carbide resistor bodies
Assignee: Unifrax I LLC
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Filing: 1958-02-17
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Granted: 1960-06-21
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Expires: 1978-02-17
Abstract
No abstract record available.
Inventors
- 👤 Roland R Van Der Beck Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:42
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/04; C; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/956; H01C; H01C7/00; H01C7/04; H01C7/042; H01C7/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A SILICON CARBIDE RESISTANCE BODY CONSISTING ESSENTIALLY OF A HOMOGENEOUS, RECRYSTALLIZED BODY OF SILICON CARBIDE, THE SILICON CARBIDE OF SAID BODY BEING A MIXTURE OF 5% TO 90% BY WEIGHT GREEN SILICON CARBIDE AND 95% TO 10% BY WEIGHT BLACK SILICON CARBIDE, ONE OF SAID VARIETIES BEING PREDOMINANTLY OF DISCRETE COARSE PARTICLES AND THE OTHER VARIETY BEING PREDOMINANTLY IN THE FORM OF A SEMI-CONTINUOUS RECRYSTALLIZED PHASE.
Claim 2
Dependent Claim
66 words
A SILICON CARBIDE RESISTANCE BODY CONSISTING ESSENTIALLY OF A HOMOGENEOUS, RECRYSTALLIZED BODY OF SILICON CARBIDE, THE SILICON CARBIDE OF SAID BODY BEING A MIXTURE OF 5% TO 90% BY WEIGHT GREEN SILICON CARBIDE AND 95% TO 10% BY WEIGHT BLACK SILICON CARBIDE, ONE OF SAID VARIETIES BEING PREDOMINANTLY OF DISCRETE COARSE PARTICLES AND THE OTHER VARIETY BEING PREDOMINANTLY IN THE FORM OF A SEMI-CONTINUOUS RECRYSTALLIZED PHASE.
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) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |