Patent US2863422A successfully refreshed from Google Patents.
US2863422A
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Hydraulic follow up systems
Assignee: Individual
•
Filing: 1954-02-19
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Granted: 1958-12-09
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Expires: 1974-02-19
Abstract
No abstract record available.
Inventors
- 👤 Mercier Jean
- 👤 Audemar Pierre Guillaume Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:12
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/02; F15B9/08; F15B9/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1530445A
Cited
US2167328A
Cited
US2414690A
Cited
US2440687A
Cited
US2310100A
Cited
US2418129A
Cited
US2503447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |