Patent US3073455A successfully refreshed from Google Patents.
US3073455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derrick
Assignee: HOLAN CORP
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Filing: 1961-01-12
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Granted: 1963-01-15
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Expires: 1981-01-12
Abstract
No abstract record available.
Inventors
- 👤 George H Eckels
- 👤 Curtis W Verrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:04
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/28; B66; B66C; B66C13/00; B66C13/18; B66C2700/00; B66C2700/06; B66C2700/062; B66C2700/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
IN A PORTABLE TYPE DERRICK COMPRISING A BOOM, SAID BOOM COMPRISING AN INNER SECTION AND AN OUTER SECTION, SAID OUTER SECTION BEING ADAPTED FOR RELATIVE LENGTHWISE MOVEMENT WITH RESPECT TO SAID INNER SECTION FOR VARYING THE EFFECTIVE LENGTH OF SAID BOOM, MEANS FOR MOVING SAID OUTER BOOM SECTION LENGTHWISE RELATIVE TO SAID INNER BOOM SECTION, AND MEANS ON SAID BOOM FOR ATTACHING AN ASSOCIATED WORK MECHANISM THERETO, SAID LAST MENTIONED MEANS COMPRISING A WORK MECHANISM SUPPORTING MEMBER MOUNTED ON SAID OUTER BOOM, SECTION, SAID OUTER BOOM SECTION BEING MOVABLE LENGTHWISE WITH RESPECT TO SAID SUPPORTING MEMBER, MEANS FOR COUPLING SAID SUPPORTING MEMBER TO SAID OUTER BOOM SECTION FOR MOVEMENT THEREWITH RELATIVE TO SAID INNER BOOM, SECTION, AND MEANS FOR COUPLING SAID SUPPORTING MEMBER TO SAID INNER BOOM SECTION FOR MOVEMENT OF SAID OUTER BOOM SECTION RELATIVE TO SAID SUPPORTING MEMBER AND TO SAID INNER BOOM SECTION.
Claim 2
Dependent Claim
146 words
IN A PORTABLE TYPE DERRICK COMPRISING A BOOM, SAID BOOM COMPRISING AN INNER SECTION AND AN OUTER SECTION, SAID OUTER SECTION BEING ADAPTED FOR RELATIVE LENGTHWISE MOVEMENT WITH RESPECT TO SAID INNER SECTION FOR VARYING THE EFFECTIVE LENGTH OF SAID BOOM, MEANS FOR MOVING SAID OUTER BOOM SECTION LENGTHWISE RELATIVE TO SAID INNER BOOM SECTION, AND MEANS ON SAID BOOM FOR ATTACHING AN ASSOCIATED WORK MECHANISM THERETO, SAID LAST MENTIONED MEANS COMPRISING A WORK MECHANISM SUPPORTING MEMBER MOUNTED ON SAID OUTER BOOM, SECTION, SAID OUTER BOOM SECTION BEING MOVABLE LENGTHWISE WITH RESPECT TO SAID SUPPORTING MEMBER, MEANS FOR COUPLING SAID SUPPORTING MEMBER TO SAID OUTER BOOM SECTION FOR MOVEMENT THEREWITH RELATIVE TO SAID INNER BOOM, SECTION, AND MEANS FOR COUPLING SAID SUPPORTING MEMBER TO SAID INNER BOOM SECTION FOR MOVEMENT OF SAID OUTER BOOM SECTION RELATIVE TO SAID SUPPORTING MEMBER AND TO SAID INNER BOOM SECTION.
References Cited (Backward Citations)
US2568959A
Cited
US2959398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |