US2987868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stalk shredder
Assignee: CUNNINGHAM AND SONS
•
Filing: 1958-12-08
•
Granted: 1961-06-13
•
Expires: 1978-12-08
Abstract
No abstract record available.
Inventors
- 👤 Cunningham Arthur Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:22
CPC Classifications
A; A01; A01F; A01F29/00; A01F29/02; A01F29/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1786978A
Cited
US2529358A
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US2618112A
Cited
US2580640A
Cited
US2531732A
Cited
US2656662A
Cited
US2701940A
Cited
US2701941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |