US2277507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow tile
Assignee: Unifrax I LLC
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Filing: 1938-12-16
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Granted: 1942-03-24
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Expires: 1958-12-16
Abstract
No abstract record available.
Inventors
- 👤 Raymond C Benner
- 👤 Mcmullen John Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:31
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/04; F27D1/06; F27D1/063; F27D1/066; B; B28; B28B; B28B1/00; B28B1/14; B28B1/54; B28B11/00; B28B11/003; B28B11/006; C; C04; C04B; C04B35/00; C04B35/622; C04B35/653; C04B35/657; C04B35/66
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) | 1945-03-23 | 1945-09-22 | 1946-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-03-23 | 1949-09-22 | 1950-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-03-23 | 1953-09-22 | 1954-03-24 | $7700.00 | Window Closed / Lapsed |