US2927773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact driver for well points and the like
Assignee: Individual
•
Filing: 1957-09-25
•
Granted: 1960-03-08
•
Expires: 1977-09-25
Abstract
No abstract record available.
Inventors
- 👤 Herbert F Wilke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:11
CPC Classifications
E; E03; E03B; E03B3/00; E03B3/06; E03B3/08; E03B3/12; Y; Y02; Y02A; Y02A20/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US6675A
Cited
US269619A
Cited
GB189314949A
Cited
US1050668A
Cited
US1267174A
Cited
US1533897A
Cited
US1646039A
Cited
US1803307A
Cited
US1867201A
Cited
US2243292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |