US2807176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic drill feed
Assignee: BELLOWS Co
•
Filing: 1952-03-07
•
Granted: 1957-09-24
•
Expires: 1972-03-07
Abstract
No abstract record available.
Inventors
- 👤 Willis C Butcher
- 👤 Herbert B Link
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:50
CPC Classifications
B; B23; B23Q; B23Q15/00; B23Q15/007; B23Q15/12; B23Q11/00; B23Q11/04; B23Q5/00; B23Q5/22; B23Q5/26; B23Q5/261; B23Q5/263; B23Q5/265; Y; Y10; Y10T; Y10T408/00; Y10T408/23; Y10T408/65; Y10T408/675; Y10T408/6757
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1920979A
Cited
US1998873A
Cited
US1911138A
Cited
US1871499A
Cited
US2079640A
Cited
US2210691A
Cited
US2396422A
Cited
US2381375A
Cited
US2491983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |