US3006416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stop device for well pipes
Assignee: —
•
Filing: —
•
Granted: 1961-10-31
•
Expires: 1978-10-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:24
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/01; E21B40/00; E21B40/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2107198A
Cited
US2214196A
Cited
US2213580A
Cited
US2358466A
Cited
US2661024A
Cited
US2839145A
Cited
US2765855A
Cited
US8816613B2
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 |