US2462571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic stroke control for cylinder and piston mechanisms
Assignee: Individual
•
Filing: 1944-11-28
•
Granted: 1949-02-22
•
Expires: 1964-11-28
Abstract
No abstract record available.
Inventors
- 👤 Thompson Robert Hurd
- 👤 Harvey Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:37
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/02; F04B47/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US694547A
Cited
US1527678A
Cited
US1876044A
Cited
US2196522A
Cited
US2292648A
Cited
US2231158A
Cited
US2260127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-22 | 1952-08-23 | 1953-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-22 | 1956-08-23 | 1957-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-22 | 1960-08-23 | 1961-02-22 | $7700.00 | Window Closed / Lapsed |