US2424645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fused aluminum oxide abrasive material
Assignee: Unifrax I LLC
•
Filing: 1943-07-13
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Granted: 1947-07-29
•
Expires: 1963-07-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry N Baumann
- 👤 Raymond C Benner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:51
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; C09K3/1409; C09K3/1427; C30; C30B; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C30B29/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2339264A
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US2347685A
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US1075659A
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US1161620A
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US1149064A
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US2152656A
Cited
US2279260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-28 | 1951-01-27 | 1951-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-28 | 1955-01-27 | 1955-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-28 | 1959-01-27 | 1959-07-29 | $7700.00 | Window Closed / Lapsed |