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US3306373A
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Hole digger and derrick apparatus
Assignee: PITMAN MANUFACTURING COMPANY Inc (PITMAN) A CORP OF
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Filing: 1960-11-28
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Granted: 1967-02-28
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Expires: 1980-11-28
Abstract
No abstract record available.
Inventors
- 👤 Raymond F Pitman
- 👤 Dean E Broderson
- 👤 Jr Herbert W Gronemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:35
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/087; E02; E02F; E02F9/00; E02F9/08; E02F9/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN A HOISTING UNIT ADAPTED TO BE MOUNTED ON A MOBILE VEHICLE, A ROTATABLE BASE ASSEMBLY; EXTENSIBLE BOOM STRUCTURE CARRIED BY SAID ASSEMBLY AND PROVIDED WITH A PLURALITY OF RELATIVELY LONGITUDINALLY SHIFTABLE BOOM ELEMENTS; TOOL MEANS; AND MEANS MOUNTING THE TOOL MEANS ON THE BOOM STRUCTURE AND INCLUDING SELECTIVELY ENGAGEABLE COMPONENTS FOR RELEASABLY SECURING THE TOOL MEANS TO ANY SELECTED BOOM FOR MOVEMENT RELATIVE TO THE REMAINING BOOM ELEMENTS.
Claim 2
Dependent Claim
69 words
IN A HOISTING UNIT ADAPTED TO BE MOUNTED ON A MOBILE VEHICLE, A ROTATABLE BASE ASSEMBLY; EXTENSIBLE BOOM STRUCTURE CARRIED BY SAID ASSEMBLY AND PROVIDED WITH A PLURALITY OF RELATIVELY LONGITUDINALLY SHIFTABLE BOOM ELEMENTS; TOOL MEANS; AND MEANS MOUNTING THE TOOL MEANS ON THE BOOM STRUCTURE AND INCLUDING SELECTIVELY ENGAGEABLE COMPONENTS FOR RELEASABLY SECURING THE TOOL MEANS TO ANY SELECTED BOOM FOR MOVEMENT RELATIVE TO THE REMAINING BOOM ELEMENTS.
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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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |