Patent US2857902A successfully refreshed from Google Patents.
US2857902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary device for the distribution of fluids into and from the cylinders of driving or working reciprocating machines
Assignee: Individual
•
Filing: 1956-05-31
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Granted: 1958-10-28
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Expires: 1976-05-31
Abstract
No abstract record available.
Inventors
- 👤 John Roger Georges Van Vorst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:33
CPC Classifications
F; F01; F01L; F01L7/00; F01L7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1057297A
Cited
US1209390A
Cited
US1128757A
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US1139101A
Cited
US1506185A
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US1880745A
Cited
US1977025A
Cited
US2048134A
Cited
FR775975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |