US2027786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making boron carbide articles
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1933-10-20
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Granted: 1936-01-14
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Expires: 1953-10-20
Abstract
No abstract record available.
Inventors
- 👤 Raymond R Ridgway
- 👤 Bruce L Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:09
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/563; A; A01; A01M; A01M31/00; A01M31/004; C04B35/622; C04B35/64; C04B35/645
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1939-01-13 | 1939-07-15 | 1940-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-01-13 | 1943-07-15 | 1944-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-01-13 | 1947-07-15 | 1948-01-14 | $7700.00 | Window Closed / Lapsed |