US3379647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal carbide and boride production
Assignee: Unifrax I LLC
•
Filing: 1966-05-04
•
Granted: 1968-04-23
•
Expires: 1986-05-04
Abstract
No abstract record available.
Inventors
- 👤 Paul A Smudski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:48
CPC Classifications
C; C01; C01B; C01B35/00; C01B35/02; C01B35/04; C01B32/00; C01B32/90; C01P; C01P2002/00; C01P2002/70; C01P2002/77; C01P2004/00; C01P2004/60; C01P2004/61; C01P2004/62; C01P2006/00; C01P2006/60; C01P2006/80
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2799912A
Cited
GB771633A
Cited
US2964388A
Cited
DE1147208B
Cited
US3013875A
Cited
US3085863A
Cited
US3249401A
Cited
US3154378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |