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Patent US2549989A successfully refreshed from Google Patents.
US2549989A
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Constant pressure multiple motor hydraulic power transmission system
Assignee: Vickers Inc
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Filing: 1946-09-21
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Granted: 1951-04-24
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Expires: 1966-09-21
Abstract
No abstract record available.
Inventors
- 👤 Simonds Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:14
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/02; F15B11/04; F15B11/05; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/2053; F15B2211/20546; F15B2211/20569; F15B2211/255; F15B2211/70; F15B2211/705; F15B2211/7058; F15B2211/71; F15B2211/7107; F15B2211/76; F15B2211/763
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) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |