US2953122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic check for air drilling units
Assignee: ETTCO TOOL AND MACHINE CO Inc
•
Filing: 1958-11-17
•
Granted: 1960-09-20
•
Expires: 1978-11-17
Abstract
No abstract record available.
Inventors
- 👤 Asher I Zagar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:35
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/06; F15B11/072; F15B11/076; B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/26; B23Q5/261; B23Q5/263; B23Q5/265; F15B2211/00; F15B2211/40; F15B2211/405; F15B2211/40576; F15B2211/40584; F15B2211/47; F15B2211/473; F15B2211/60; F15B2211/625; F15B2211/70; F15B2211/75
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2067492A
Cited
GB676805A
Cited
US2715389A
Cited
US2733691A
Cited
US2664859A
Cited
US2756546A
Cited
US2852965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |