US3078931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free corer
Assignee: Individual
•
Filing: 1960-12-08
•
Granted: 1963-02-26
•
Expires: 1980-12-08
Abstract
No abstract record available.
Inventors
- 👤 David G Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:19
CPC Classifications
E; E21; E21B; E21B25/00; E21B25/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
AN EARTH CORER COMPRISING IN COMBINATION WEIGHTED CORE CUTTING MEANS, MEANS SLIDABLY DISPOSED WITHIN SAID WEIGHTED CORE CUTTING MEANS FOR RECEIVING THE EARTH CORE CUT THEREBY, A FLOAT MEANS CONNECTED TO SAID EARTH CORE RECEIVING MEANS, AND LATCH MEANS INTER-CONNECTING SAID FLOAT MEANS AND SAID WEIGHTED CORE CUTTING MEANS FOR TIMELY LATCHING AND UNLATCHING SAME.
Claim 2
Dependent Claim
55 words
AN EARTH CORER COMPRISING IN COMBINATION WEIGHTED CORE CUTTING MEANS, MEANS SLIDABLY DISPOSED WITHIN SAID WEIGHTED CORE CUTTING MEANS FOR RECEIVING THE EARTH CORE CUT THEREBY, A FLOAT MEANS CONNECTED TO SAID EARTH CORE RECEIVING MEANS, AND LATCH MEANS INTER-CONNECTING SAID FLOAT MEANS AND SAID WEIGHTED CORE CUTTING MEANS FOR TIMELY LATCHING AND UNLATCHING SAME.
References Cited (Backward Citations)
US2145170A
Cited
US2260320A
Cited
US2488486A
Cited
US2650068A
Cited
US2829868A
Cited
US2807439A
Cited
US2798378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |