US3493200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positioner for rock drills
Assignee: Gardner Denver Inc
•
Filing: 1968-02-09
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Granted: 1970-02-03
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Expires: 1988-02-09
Abstract
No abstract record available.
Inventors
- 👤 Mervin H Huffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:21
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/025; E21B7/022; F; F16; F16M; F16M11/00; F16M11/02; F16M11/04; F16M11/043; F16M11/048; F16M11/20; F16M11/2007; F16M11/2035; F16M11/2064; F16M2200/00; F16M2200/04; F16M2200/044; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20207; Y10T74/20213
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2690896A
Cited
US2703222A
Cited
US3212738A
Cited
US3226064A
Cited
US3374975A
Cited
US3338316A
Cited
US3304033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |