US2145888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrading tool
Assignee: American Optical Corp
•
Filing: 1936-06-06
•
Granted: 1939-02-07
•
Expires: 1956-06-06
Abstract
No abstract record available.
Inventors
- 👤 Harold R Moulton
- 👤 Fay D Kinney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:33
CPC Classifications
B; B24; B24D; B24D7/00; B24D7/06; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/932; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12042; Y10T428/12063; Y10T428/1209; Y10T428/12361; Y10T428/12993
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1942-02-06 | 1942-08-08 | 1943-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-02-06 | 1946-08-08 | 1947-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-02-06 | 1950-08-08 | 1951-02-07 | $7700.00 | Window Closed / Lapsed |