US3413994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable gain proportional amplifier
Assignee: Bowles Engineering Corp
•
Filing: 1965-08-18
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Granted: 1968-12-03
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Expires: 1985-08-18
Abstract
No abstract record available.
Inventors
- 👤 Iii Edwin U Sowers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:12
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/14; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/218; Y10T137/2229; Y10T137/2251; Y10T137/2256
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PUR FLUID PROPORTIONAL AMPLIFIER COMPRISING AN INTERACTION CHAMBER; SOURCE MEANS IN FLUID FLOW COMMUNICATION WITH SAID INTERACTION CHAMBER FOR PROVIDING A POWER JET THERETO; A PASSAGEWAY OPENING INTO SAID INTERACTION CHAMBER FOR RECEIVING FLUID OF THE POWER JET THEREFROM; FIRST CONTROL MEANS OPERATIVE WITHIN SAID INTERACTION CHAMBER FOR DEFLECTING THE POWER JET WITH RESPECT TO SAID PASSAGEWAY FOR VARYING THE FLOW OF FLUID OF THE POWER JET INTO SAID PASAGEWAY; UTILIZATION MEANS IN FLUID FLOW COMMUNICATION WITH SAID PASSAGEWAY HAVING A GIVEN IMPEDANCE; VARIABLE IMPEDANCE MEANS IN FLUID FLOW COMMUNICATION WITH SAID PASSAGEWAY; MEANS FOR CONTROLLING SAID VARIABLE IMPEDANCE IN RESPONSE TO A SIGNAL.
Claim 2
Dependent Claim
105 words
A PUR FLUID PROPORTIONAL AMPLIFIER COMPRISING AN INTERACTION CHAMBER; SOURCE MEANS IN FLUID FLOW COMMUNICATION WITH SAID INTERACTION CHAMBER FOR PROVIDING A POWER JET THERETO; A PASSAGEWAY OPENING INTO SAID INTERACTION CHAMBER FOR RECEIVING FLUID OF THE POWER JET THEREFROM; FIRST CONTROL MEANS OPERATIVE WITHIN SAID INTERACTION CHAMBER FOR DEFLECTING THE POWER JET WITH RESPECT TO SAID PASSAGEWAY FOR VARYING THE FLOW OF FLUID OF THE POWER JET INTO SAID PASAGEWAY; UTILIZATION MEANS IN FLUID FLOW COMMUNICATION WITH SAID PASSAGEWAY HAVING A GIVEN IMPEDANCE; VARIABLE IMPEDANCE MEANS IN FLUID FLOW COMMUNICATION WITH SAID PASSAGEWAY; MEANS FOR CONTROLLING SAID VARIABLE IMPEDANCE IN RESPONSE TO A SIGNAL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |