Patent US3420312A successfully refreshed from Google Patents.
US3420312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Harvester cutting mechanism
Assignee: FMC Corp
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Filing: 1966-07-18
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Granted: 1969-01-07
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Expires: 1986-07-18
Abstract
No abstract record available.
Inventors
- 👤 Edwin F Greedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:31
CPC Classifications
A; A01; A01D; A01D45/00; A01D45/008
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
113 words
IN COMBINATION A MOBILE SUPPORT STRUCTURE, MEANS FOR MOVING SAID VEHIVEL FORWARDLY, A PAIR OF OPOSITELYROTATING LATERALLY ADJACENT CUTTING DISCS, MEANS MOUNTING SAID DISCS ON SAID STRUCTURE, MEANS FOR ROTATING SAID DISCS IN OPPOSITE DIRECTIONS WITH THEIR LEADING PERIPHERAL EDGES DISPOSED BELOW THE SURFACE OF THE GROUND AND MOVING INWARDLY TOWARD A VERTICAL PLANE THROUGH THE LONGITUDINAL CENTERLINE OF SAID STRUCTURE, MEANS FOR SENSING THE HEIGHT OF DIRT DEPOSITED BY SAID DISCS REARWARDLY THEREOF DURING FORWARD MOVEMENT OF SAID MOBILE SUPPORT STRUCTURE, AND MEANS OPERATIVELY CONNECTED BETWEEN SAID SENSING MEANS AND SAID DISC MOUNTING MEANS FOR ADJUSTING THE HEIGHT OF SAID DISCS IN RESPONSE TO CHANGES IN THE HEIGHT OF THE DEPOSITED DIRT.
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) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |