US2831297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Honing equipment
Assignee: NAT PIONEER Inc
•
Filing: 1957-06-10
•
Granted: 1958-04-22
•
Expires: 1977-06-10
Abstract
No abstract record available.
Inventors
- 👤 William D Skran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:52
CPC Classifications
B; B24; B24B; B24B33/00; B24B33/08; B24B33/087
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2001122A
Cited
US2264360A
Cited
US2284325A
Cited
US2299225A
Cited
US2403546A
Cited
US2412419A
Cited
US2477508A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |