US2472934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control means for internal-combustion-operated free-piston machines
Assignee: Alan Muntz and Co Ltd
•
Filing: 1944-06-20
•
Granted: 1949-06-14
•
Expires: 1964-06-20
Abstract
No abstract record available.
Inventors
- 👤 Beale Evelyn Stewart Lansdowne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:08
CPC Classifications
F; F02; F02B; F02B71/00; F02B71/04; F02B71/06; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1757215A
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US2178310A
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US2222260A
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US2265285A
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US2215326A
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US2091611A
Cited
US2168828A
Cited
GB541779A
Cited
US2344058A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |