US3490930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory composition
Assignee: NATIONAL REFRACTORIES & MINERALS Corp A CORP OF
•
Filing: 1967-08-07
•
Granted: 1970-01-20
•
Expires: 1987-08-07
Abstract
No abstract record available.
Inventors
- 👤 Jacques R Martinet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:16
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/42; C04B35/03; C04B35/12; C04B35/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2999759A
Cited
US3360388A
Cited
US2389538A
Cited
US3093458A
Cited
US3257217A
Cited
US3193402A
Cited
US3184321A
Cited
US3233015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |