Patent US3433049A successfully refreshed from Google Patents.
US2497745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallurgical briquette
Assignee: Unifrax I LLC
•
Filing: 1948-08-28
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Granted: 1950-02-14
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Expires: 1968-08-28
Abstract
No abstract record available.
Inventors
- 👤 Robert W Stohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:02
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A METALLURGICAL BRIQUET CONSISTING ESSENTIALLY OF SILICON CARBIDE, A BOND AND PARTICLES OF VERMICULITE.
Claim 2
Dependent Claim
14 words
A METALLURGICAL BRIQUET CONSISTING ESSENTIALLY OF SILICON CARBIDE, A BOND AND PARTICLES OF VERMICULITE.
References Cited (Backward Citations)
US1766887A
Cited
US1869925A
Cited
US2020171A
Cited
US2079110A
Cited
US2119521A
Cited
US2279617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |