US3343614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bore hole forming apparatus
Assignee: Individual
•
Filing: 1965-06-01
•
Granted: 1967-09-26
•
Expires: 1985-06-01
Abstract
No abstract record available.
Inventors
- 👤 Rudolph E Parisien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:31
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/28; E21B7/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
AN APPARATUS FOR EXPANDING THE LOWER PORTION OF A POST HOLE, SAID APPARATUS COMPRISING A FRAME INCLUDING A GUIDE MEMBER, A PUSH ROD SLIDABLE ON SAID GUIDE, EXTENSIBLE MEANS ACTING BETWEEN SAID FRAME AND SAID PUSH ROD FOR MOVING SAID PUSH ROD AXIALLY OUTWARDLY RELATIVE TO SAID FRAME, AT LEAST A PAIR OF CONCAVO-CONVEX PLATES, AN INNER END OF EACH PLATE BEING PIVOTALLY SECURED TO ONE END OF SAID GUIDE, AT LEAST A PAIR OF LINKS, EACH SAID LINK PIVOTALLY INTERCONNECTING AN OUTER END OF ONE OF SAID PLATES WITH AN END OF SAID PUSH ROD REMOTE FROM SAID EXTENSIBLE MEANS
Claim 2
Independent Claim
101 words
AN APPARATUS FOR EXPANDING THE LOWER PORTION OF A POST HOLE, SAID APPARATUS COMPRISING A FRAME INCLUDING A GUIDE MEMBER, A PUSH ROD SLIDABLE ON SAID GUIDE, EXTENSIBLE MEANS ACTING BETWEEN SAID FRAME AND SAID PUSH ROD FOR MOVING SAID PUSH ROD AXIALLY OUTWARDLY RELATIVE TO SAID FRAME, AT LEAST A PAIR OF CONCAVO-CONVEX PLATES, AN INNER END OF EACH PLATE BEING PIVOTALLY SECURED TO ONE END OF SAID GUIDE, AT LEAST A PAIR OF LINKS, EACH SAID LINK PIVOTALLY INTERCONNECTING AN OUTER END OF ONE OF SAID PLATES WITH AN END OF SAID PUSH ROD REMOTE FROM SAID EXTENSIBLE MEANS
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |