US3006680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe handling apparatus for use in and about a derrick
Assignee: Individual
•
Filing: 1957-10-28
•
Granted: 1961-10-31
•
Expires: 1977-10-28
Abstract
No abstract record available.
Inventors
- 👤 James N Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:45
CPC Classifications
E; E21; E21B; E21B19/00; Y; Y10; Y10T; Y10T279/00; Y10T279/10; Y10T279/1037; Y10T279/1066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1864978A
Cited
US2299116A
Cited
US2374947A
Cited
US2538693A
Cited
US2670799A
Cited
US2820481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |