US2473476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and mold for making boron carbide articles
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1946-04-03
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Granted: 1949-06-14
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Expires: 1966-04-03
Abstract
No abstract record available.
Inventors
- 👤 James W Knowlton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:24
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/563; C04B35/622; C04B35/64; C04B35/645
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2301508A
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US2332281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |