US2640429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic power unit
Assignee: Detroit Harvester Co
•
Filing: 1949-03-21
•
Granted: 1953-06-02
•
Expires: 1969-03-21
Abstract
No abstract record available.
Inventors
- 👤 Stewart B Mcleod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:29
CPC Classifications
F; F15; F15B; F15B1/00; F15B1/26; F04; F04B; F04B49/00; F04B49/02; F04B49/03; F04B49/035; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85954
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2135881A
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US2222203A
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US2272926A
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US2312686A
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US2451799A
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US2540714A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |