US2279260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory and abrasive material and process of making same
Assignee: Unifrax I LLC
•
Filing: 1939-03-21
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Granted: 1942-04-07
•
Expires: 1959-03-21
Abstract
No abstract record available.
Inventors
- 👤 Raymond C Benner
- 👤 Jr Henry N Baumann
- 👤 George J Easter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:07
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/42; C04B35/10; C04B35/107; C04B35/12; C04B35/44
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) | 1945-04-06 | 1945-10-06 | 1946-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-04-06 | 1949-10-06 | 1950-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-04-06 | 1953-10-06 | 1954-04-07 | $7700.00 | Window Closed / Lapsed |