US3073396A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable derrick with telescoping fluid transmission lines
Assignee: HOLAN CORP
•
Filing: 1961-04-12
•
Granted: 1963-01-15
•
Expires: 1981-04-12
Abstract
No abstract record available.
Inventors
- 👤 George H Eckels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:12
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/087; B; B66; B66C; B66C13/00; B66C13/18; B66C2700/00; B66C2700/06; B66C2700/062; B66C2700/065
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
119 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 ON SAID BOOM FOR ATTACHING AN ASSOCIATED FLUID ACTUATED MECHANISM SUCH AS A FLUID MOTOR DRIVEN EARTH BORING TOOL THERETO, SAID LAST MENTIONED MEANS COMPRISING WORK MECHANISM SUPPORTING MEMBER SLIDABLE ON SAID OUTER BOOM SECTION, MEANS FOR SELECTIVELY COUPLING SAID SUPPORTING MEMBER TO SAID OUTER BOOM SECTION FOR MOVEMENT OF SAID SUPPORTING MEMBER WITH SAID OUTER BOOM SECTION AND RELATIVE TO SAID INNER BOOM SECTION, AND EXTENSIBLE FLUID TRANSMISSION LINE MEANS MOUNTED ON SAID INNER BOOM SECTION
References Cited (Backward Citations)
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 |