Patent US3391343A successfully refreshed from Google Patents.
Patent US3424090A successfully refreshed from Google Patents.
US3424090A
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Pneumatic control system and vent valve therefor
Assignee: FLOMATCHER CO Inc
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Filing: 1967-06-26
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Granted: 1969-01-28
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Expires: 1987-06-26
Abstract
No abstract record available.
Inventors
- 👤 Paul E Hyde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:06
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/12; F; F04; F04D; F04D15/00; F04D15/0066; G05D13/00; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7339
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2734458A
Cited
US3123005A
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US2956581A
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US3021789A
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US3279001A
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US3213795A
Cited
US3263616A
Cited
US3360002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |