US2431035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive article and method of making
Assignee: Unifrax I LLC
•
Filing: 1945-06-12
•
Granted: 1947-11-18
•
Expires: 1965-06-12
Abstract
No abstract record available.
Inventors
- 👤 George J Goepfert
- 👤 Halsey W Buell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:45
CPC Classifications
B; B24; B24D; B24D11/00; B24D11/06; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1066; Y10T428/00; Y10T428/19; Y10T428/192; Y10T428/195; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31964
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2313953A
Cited
US2350861A
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 |