US3568423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual hitch frame
Assignee: Unisys Corp
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Filing: 1967-10-17
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Granted: 1971-03-09
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Expires: 1987-10-17
Abstract
Abstract A DUAL HITCH FRAME CONNECTABLE TO A TRACTOR TO BE TOWED THEREBY OVER A FIELD HAVING HAY TO BE RAKED AND ADAPTED TO HAVE CONNECTED TO IT A PAIR OF SIDE DELIVERY RAKES WHICH DELIVER RAKED HAY TOWARD EACH OTHER FOR DEPOSIT IN A SINGLE WINDROW, SAID HITCH FRAME COMPRISING A HORIZONTAL TRANSVERSE BAR PERPENDICULAR TO THE DIRECTION OF TRAVEL HAVING A PAIR OF LATERALLY SPACED HITCH MEMBERS TO WHICH THE RAKES ARE ATTACHED AND HAVING A PAIR OF GROUND WHEELS.
Inventors
- 👤 John K Hale
- 👤 Charles B Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:47
CPC Classifications
A; A01; A01D; A01D67/00; A01D67/005; A01D78/00; A01D78/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |