US2588901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shank and socket connection for augers
Assignee: Salem Tool Co
•
Filing: 1949-05-19
•
Granted: 1952-03-11
•
Expires: 1969-05-19
Abstract
No abstract record available.
Inventors
- 👤 Harry L Weikart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:26
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/046; E21B10/00; E21B10/44; Y; Y10; Y10T; Y10T403/00; Y10T403/55; Y10T403/59; Y10T403/591; Y10T403/592
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US932071A
Cited
US932744A
Cited
US1236145A
Cited
US2206166A
Cited
US2221680A
Cited
US2259191A
Cited
US2477818A
Cited
GB591570A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |