US2431258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated abrasive article and method of manufacturing the same
Assignee: Unifrax I LLC
•
Filing: 1946-02-05
•
Granted: 1947-11-18
•
Expires: 1966-02-05
Abstract
No abstract record available.
Inventors
- 👤 Henry P Kirchner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:09
CPC Classifications
B; B24; B24D; B24D13/00; B24D13/14; B24D18/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/1031; Y10T156/1043; Y10T156/1044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1759168A
Cited
US1966473A
Cited
US2085211A
Cited
US2152392A
Cited
US2269661A
Cited
US2190479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-17 | 1951-05-19 | 1951-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-17 | 1955-05-19 | 1955-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-17 | 1959-05-19 | 1959-11-18 | $7700.00 | Window Closed / Lapsed |