Patent US3025871A successfully refreshed from Google Patents.
US3025871A
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US
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Operating valve and piston
Assignee: MONARCH EQUIPMENT CO
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Filing: 1957-10-18
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Granted: 1962-03-20
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Expires: 1977-10-18
Abstract
No abstract record available.
Inventors
- 👤 Grant V W Roth
- 👤 Frank E Saari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:36
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/22; B63C11/2236; F; F16; F16K; F16K31/00; F16K31/12; F16K31/122; F16K31/1221; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86759; Y10T137/87917; Y10T137/87981; Y10T137/87997; Y10T137/88005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1004845A
Cited
GB186225A
Cited
GB362953A
Cited
US1983163A
Cited
US2217959A
Cited
US2589794A
Cited
US2763282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-19 | 1965-09-18 | 1966-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-19 | 1969-09-18 | 1970-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-19 | 1973-09-18 | 1974-03-20 | $7700.00 | Window Closed / Lapsed |