US2639569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-propelled harvester with automatically controlled variablespeed drive
Assignee: Deere and Co
•
Filing: 1950-05-18
•
Granted: 1953-05-26
•
Expires: 1970-05-18
Abstract
No abstract record available.
Inventors
- 👤 Stanley F Pasturczak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:56
CPC Classifications
A; A01; A01D; A01D41/00; A01D41/12; A01D41/127; A01D41/1274; A01D69/00; A01D69/06; Y; Y10; Y10S; Y10S56/00; Y10S56/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US954394A
Cited
US2150456A
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US2212465A
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US2329831A
Cited
US2521457A
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US2528275A
Cited
US2510325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |