Patent US3213514A successfully refreshed from Google Patents.
US3213514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing cultivating discs for agricultural implements
Assignee: International Motors LLC
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Filing: 1962-05-22
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Granted: 1965-10-26
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Expires: 1982-05-22
Abstract
No abstract record available.
Inventors
- 👤 Evans James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:14
CPC Classifications
B; B21; B21J; B21J19/00; A; A01; A01B; A01B23/00; A01B23/06; Y; Y10; Y10T; Y10T29/00; Y10T29/27; Y10T29/49; Y10T29/49448
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A METHOD OF FORMING A METAL EARTH-WORKING DISC; COMPRISING THE STEPS OF, FORMING A NOTCH ON THE PERIPHERY OF A SUBSTANTIALLY CIRCULAR, FLAT METAL BLANK; AND COMPRESSING THE MARGINAL MATERIAL OUTLINING THE NOTCH TO FORM A CUTTING EDGE.
Claim 2
Independent Claim
38 words
A METHOD OF FORMING A METAL EARTH-WORKING DISC; COMPRISING THE STEPS OF, FORMING A NOTCH ON THE PERIPHERY OF A SUBSTANTIALLY CIRCULAR, FLAT METAL BLANK; AND COMPRESSING THE MARGINAL MATERIAL OUTLINING THE NOTCH TO FORM A CUTTING EDGE.
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |