US2468056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive articles and method of manufacturing the same
Assignee: Unifrax I LLC
•
Filing: 1944-10-24
•
Granted: 1949-04-26
•
Expires: 1964-10-24
Abstract
No abstract record available.
Inventors
- 👤 George J Goepfert
- 👤 Norman P Robie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:14
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/02; B24D3/20; B24D3/28; B24D3/285
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2335701A
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US2399055A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-25 | 1952-10-25 | 1953-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-25 | 1956-10-25 | 1957-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-25 | 1960-10-25 | 1961-04-26 | $7700.00 | Window Closed / Lapsed |