US3507616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of large crystal refractory metal monocarbides
Assignee: Westinghouse Electric Corp
•
Filing: 1967-08-14
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Granted: 1970-04-21
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Expires: 1987-08-14
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Tobin
- 👤 Leonard R Fleischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:59
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/5607; C04B35/5622; C01; C01B; C01B32/00; C01B32/90; C04B35/5611
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3017286A
Cited
US3254955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-20 | 1973-10-20 | 1974-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-20 | 1977-10-20 | 1978-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-20 | 1981-10-20 | 1982-04-21 | $7700.00 | Window Closed / Lapsed |