Patent US3203503A successfully refreshed from Google Patents.
US3203503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tree working machine
Assignee: University of California Berkeley
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Filing: 1964-02-18
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Granted: 1965-08-31
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Expires: 1984-02-18
Abstract
No abstract record available.
Inventors
- 👤 Roy J Smith
- 👤 Danicl T Seamount
- 👤 David W Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:19
CPC Classifications
A; A01; A01D; A01D46/00; A01D46/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A SUPPORTING APPARATUS FOR TREE WORKERS, INCLUDING: A FRAME STRUCTURE POSITIONABLE ABOVE THE GROUND; A SEAT STRUCTURE FOR SAID WORKER; A SUSPENSION AND CONTROL MEANS FOR SUSPENDING AND CONTROLLING SAID SEAT, SAID CONTROL MEANS INCLUDING A PAIR OF CONTROL MEMBERS COUPLED AT UPPER HORIZONTALLY SPACED POINTS TO SAID FRAME STRUCTURE AT THEIR UPPER ENDS AND TO LOWER HORIZONTALLY SPACED POINTS ON SAID SEAT STRUCTURE AT THEIR LOWER ENDS, THE SPACING BETWEEN THE LOWER ENDS OF SAID CONTROL MEMBERS BEING LESS THAN THE SPACING BETWEEN THE UPPER ENDS THEREOF, WHEREBY LEANING OF SAID WORKER TO ONE SIDE OF SAID SEAT STURCTURE TIPS SAID SEAT STRUCTURE AND CAUSES SAID SEAT STRUCTURE TO SWING IN THE DIRECTION IN WHICH SAID WORKER LEANS.
Claim 2
Dependent Claim
119 words
A SUPPORTING APPARATUS FOR TREE WORKERS, INCLUDING: A FRAME STRUCTURE POSITIONABLE ABOVE THE GROUND; A SEAT STRUCTURE FOR SAID WORKER; A SUSPENSION AND CONTROL MEANS FOR SUSPENDING AND CONTROLLING SAID SEAT, SAID CONTROL MEANS INCLUDING A PAIR OF CONTROL MEMBERS COUPLED AT UPPER HORIZONTALLY SPACED POINTS TO SAID FRAME STRUCTURE AT THEIR UPPER ENDS AND TO LOWER HORIZONTALLY SPACED POINTS ON SAID SEAT STRUCTURE AT THEIR LOWER ENDS, THE SPACING BETWEEN THE LOWER ENDS OF SAID CONTROL MEMBERS BEING LESS THAN THE SPACING BETWEEN THE UPPER ENDS THEREOF, WHEREBY LEANING OF SAID WORKER TO ONE SIDE OF SAID SEAT STURCTURE TIPS SAID SEAT STRUCTURE AND CAUSES SAID SEAT STRUCTURE TO SWING IN THE DIRECTION IN WHICH SAID WORKER LEANS.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |