Patent US3289690A successfully refreshed from Google Patents.
US3289690A
Expired / Lapsed
US
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Control valve
Assignee: Roanoke College
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Filing: 1963-02-12
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Granted: 1966-12-06
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Expires: 1983-02-12
Abstract
No abstract record available.
Inventors
- 👤 Frantz Virgil Lanier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:13
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/10; G05D16/103; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273; Y10T137/4336
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
IN A CONTROL VALVE HAVING A BODY, A BORE IN SAID BODY, AN OUTLET POR IN SAID BODY AND AN ORIFICE IN SAID BODY COMMUNICATING A PART OF SAID BORE WITH SAID OUTLET PORT, THE IMPROVEMENT COMPRISING A PLUNGER MOUNTED ON AND PROJECTING OUTWARDLY FROM SAID BODY AND SLIDABLE THEREIN IN ALIGNMENT WITH SAID ORIFICE, SAID PLUNGER BEING PROJECTABLE INTO SAID ORIFICE COUNTER THE DIRECTION OF AIR FLOW THERETHROUGH FOR CLEANING FOREIGN MATTER THEREFROM, SAID PLUNGER ON ACTUATION OF SAID VALVE BEING AUTOMATICALLY RESPONSIVE TO AIR INTRODUCED INTO SAID BORE PART FOR RETRACTING FROM SAID ORIFICE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |