Patent US2259499A successfully refreshed from Google Patents.
US2682736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill sharpening machine
Assignee: Individual
•
Filing: 1950-05-03
•
Granted: 1954-07-06
•
Expires: 1970-05-03
Abstract
No abstract record available.
Inventors
- 👤 Cawi Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:48
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/24; B24B3/26; B24B3/28; B24B3/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US270365A
Cited
US490583A
Cited
US512545A
Cited
US819173A
Cited
US966731A
Cited
US965952A
Cited
US1095338A
Cited
DE365574C
Cited
GB306887A
Cited
DE569065C
Cited
US2065847A
Cited
US2217545A
Cited
US2607172A
Cited
US2386687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-05 | 1958-01-04 | 1958-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-05 | 1962-01-04 | 1962-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-05 | 1966-01-04 | 1966-07-06 | $7700.00 | Window Closed / Lapsed |