US2940730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic release, safety tool joint
Assignee: Individual
•
Filing: 1957-03-25
•
Granted: 1960-06-14
•
Expires: 1977-03-25
Abstract
No abstract record available.
Inventors
- 👤 Ross A Mcclintock
- 👤 Raymond E Thompson
- 👤 Kenneth E Waggener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:53
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/06; Y; Y10; Y10S; Y10S285/00; Y10S285/922
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735497A
Cited
US1381805A
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US1645010A
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US1883071A
Cited
US1817067A
Cited
US2118350A
Cited
US2141987A
Cited
US2462477A
Cited
US2267802A
Cited
US2532418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |