Patent US3312291A successfully refreshed from Google Patents.
US3312291A
Expired / Lapsed
US
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Derricks
Assignee: Raymond International Inc
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Filing: 1964-10-05
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Granted: 1967-04-04
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Expires: 1984-10-05
Abstract
No abstract record available.
Inventors
- 👤 Stanley C Haug
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:01
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/023; B; B62; B62D; B62D55/00; B62D55/08; B62D55/084; B66; B66C; B66C23/00; E02; E02D; E02D7/00; E02D7/02; E02D7/06; E02D7/14; E02D7/16; E21B19/00; B66C2700/00; B66C2700/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A DERRICK COMPRISING A HORIZONTAL BASE, A LEADER, A PARALLEL MOTION MECHANISM PIVOTALLY INTERCONNECTING SAID BASE AND SAID LEADER, SAID LEADER BEING MEDIALLY FOLDABLE FOR SHIPPING PURPOSES, A HEAD FRAME, THE MEDIAL PORTION OF WHICH BEING PIVOTALLY CONNECTED TO SAID LEADER FOR ROTATING SAID HEAD FRAME UNDER SAID LEADER FOR SHIPPING PURPOSES, AND DRIVING MEANS FOR SAID HORIZONTAL BASE.
Claim 2
Dependent Claim
59 words
A DERRICK COMPRISING A HORIZONTAL BASE, A LEADER, A PARALLEL MOTION MECHANISM PIVOTALLY INTERCONNECTING SAID BASE AND SAID LEADER, SAID LEADER BEING MEDIALLY FOLDABLE FOR SHIPPING PURPOSES, A HEAD FRAME, THE MEDIAL PORTION OF WHICH BEING PIVOTALLY CONNECTED TO SAID LEADER FOR ROTATING SAID HEAD FRAME UNDER SAID LEADER FOR SHIPPING PURPOSES, AND DRIVING MEANS FOR SAID HORIZONTAL BASE.
References Cited (Backward Citations)
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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) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |