Patent US1762159A successfully refreshed from Google Patents.
US3487594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting tool tips and ceramics containing hafnium nitride and zirconium diboride
Assignee: Unifrax I LLC
•
Filing: 1967-09-21
•
Granted: 1970-01-06
•
Expires: 1987-09-21
Abstract
No abstract record available.
Inventors
- 👤 Yorihiro Murata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:08
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/5805; C04B35/58064; C04B35/58078; C04B35/58007; C04B35/58028; C04B35/622; C04B35/64; C04B35/645; C22; C22C; C22C29/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2984576A
Cited
US3359216A
Cited
US3325300A
Cited
US3394087A
Cited
US3409416A
Cited
US3433656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |