Patent US2484789A successfully refreshed from Google Patents.
US2484789A
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Variable displacement pump and motor
Assignee: HILL LAB
•
Filing: 1944-04-15
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Granted: 1949-10-11
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Expires: 1964-04-15
Abstract
No abstract record available.
Inventors
- 👤 Myron F Hill
- 👤 Francis A Hill
- 👤 Jr John L Chapin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:34
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/18; F04C14/185; F04C2/00; F04C2/08; F04C2/10; F04C2/102; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19949; Y10T74/19963; Y10T74/19972
Claims Analysis
Total Claims: 0
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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) | 1952-10-10 | 1953-04-11 | 1953-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-10 | 1957-04-11 | 1957-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-10 | 1961-04-11 | 1961-10-11 | $7700.00 | Window Closed / Lapsed |