Patent US5130864A successfully refreshed from Google Patents.
Patent US3015512A successfully refreshed from Google Patents.
US3015512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill collar handling sub
Assignee: Individual
•
Filing: 1960-08-11
•
Granted: 1962-01-02
•
Expires: 1980-08-11
Abstract
No abstract record available.
Inventors
- 👤 William E Oakes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:45
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/16; E21B19/00; E21B19/02; E21B19/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1342855A
Cited
US1544659A
Cited
US1544041A
Cited
US1845061A
Cited
US1939968A
Cited
US2043357A
Cited
US2473417A
Cited
US2571145A
Cited
US2803486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-01 | 1965-07-03 | 1966-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-01 | 1969-07-03 | 1970-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-01 | 1973-07-03 | 1974-01-02 | $7700.00 | Window Closed / Lapsed |