Patent US2543876A successfully refreshed from Google Patents.
US2543876A
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Hydraulic power unit with fixed piston for producing oscillating motion
Assignee: Individual
•
Filing: 1949-04-23
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Granted: 1951-03-06
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Expires: 1969-04-23
Abstract
No abstract record available.
Inventors
- 👤 William P C Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:10
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/14; F15B15/1423; F15B15/1476; B; B60; B60B; B60B39/00; B60B39/003; F15B15/12
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) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |