Patent US3559748A successfully refreshed from Google Patents.
US3559748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluted coulter disc blade
Assignee: MARCHESAN Corp A CORP OF WASHINGTON
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Filing: 1968-07-18
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Granted: 1971-02-02
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Expires: 1988-07-18
Abstract
Abstract A fluted coulter disc blade having a fluted peripheral portion with a diminished thickness peripheral portion outwardly of the flutes to provide a substantially circular and straight cutting edge.
Inventors
- 👤 Lee E Shelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:47
CPC Classifications
A; A01; A01B; A01B15/00; A01B15/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
73 words
An improved coulter blade comprising a plate having radially extending and axially alternating flutes extending inwardly from the peripheral edge portion of the plate, thereby providing radially extending and axially alternating raised portions extending inwardly from said edge portion, at least the outer ends of said raised portions being gradually diminished in thickness radially outwardly to said edge portion, said edge portion being substantially straight in side view and circular in plan view.
Claim 2
Dependent Claim
73 words
An improved coulter blade comprising a plate having radially extending and axially alternating flutes extending inwardly from the peripheral edge portion of the plate, thereby providing radially extending and axially alternating raised portions extending inwardly from said edge portion, at least the outer ends of said raised portions being gradually diminished in thickness radially outwardly to said edge portion, said edge portion being substantially straight in side view and circular in plan view.
Claim 3
Dependent Claim
24 words
An improved coulter blade as defined in claim 1 in which said diminished thickness portions have material removed therefrom closely adjacent said edge portion.
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |