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US3464507A
Expired / Lapsed
US
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Portable rotary drilling pipe handling system
Assignee: GEORGE E FAILING COMPANY Inc ENID OK 73701 A CORP OF
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Filing: 1967-07-03
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Granted: 1969-09-02
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Expires: 1987-07-03
Abstract
No abstract record available.
Inventors
- 👤 Emmett L Alexander
- 👤 Hugh D Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:32
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/14; E21B19/15; E21B19/155
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2184051A
Cited
US2539751A
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US2685378A
Cited
US2848196A
Cited
US3094852A
Cited
US3266582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |