Patent US3434437A successfully refreshed from Google Patents.
US3434437A
Expired / Lapsed
US
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Precision planter with seed accelerator
Assignee: Massey Ferguson Inc
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Filing: 1966-10-17
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Granted: 1969-03-25
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Expires: 1986-10-17
Abstract
No abstract record available.
Inventors
- 👤 Alexander H Mark
- 👤 John E Morrison Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:12
CPC Classifications
A; A01; A01C; A01C7/00; A01C7/04; A01C7/042; A01C7/044; A01C7/046; A01C7/0445
Claims Analysis
Total Claims: 0
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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) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |