Patent US2805039A successfully refreshed from Google Patents.
US2805039A
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Statically and dynamically balanced pressure actuated valve
Assignee: Individual
•
Filing: 1953-05-28
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Granted: 1957-09-03
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Expires: 1973-05-28
Abstract
No abstract record available.
Inventors
- 👤 Henry W Angelery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:58
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/365; G; G05; G05D; G05D23/00; G05D23/185; G05D23/1856
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US303712A
Cited
US1247216A
Cited
US824681A
Cited
US851555A
Cited
US895343A
Cited
US1071777A
Cited
GB251392A
Cited
US2035166A
Cited
US2111230A
Cited
US2243957A
Cited
US2401144A
Cited
US2388457A
Cited
US2536184A
Cited
US2589251A
Cited
US2679829A
Cited
DE951499C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |