Patent US3398759A successfully refreshed from Google Patents.
US3398759A
Expired / Lapsed
US
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Variable fluid impedance and systems employing same
Assignee: Individual
•
Filing: 1965-10-21
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Granted: 1968-08-27
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Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Howard L Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:30
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/02; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/212; Y10T137/218; Y10T137/2229; Y10T137/2251; Y10T137/2256
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A VARIABLE PURE FLUID IMPEDANCE COMPRISING AT LEAST TWO OUTPUT CHANNELS, AN INTERACTION REGION, MEANS FOR DIRECTING FLUID THROUGH SAID INTERACTION REGION TOWARD SAID OUTPUT CHANNELS, MEANS FOR DEVELOPING IN SAID INTERACTION REGION A DIFFERENTIAL IN PRESSURE FOR DEFLECTING SAID STREAM SO AS TO VARY THE PROPORTIONS OF FLUID DIRECTED TO EACH OF SAID OUTPUT CHANNELS, MEANS LOCATED IN SAID OUTPUT CHANNELS HAVING DIFFERENT VALUES OF FLUID IMPEDANCE, SAID OUTPUT CHANNELS BEING JOINED DOWNSTREAM OF SAID FLUID IMPEDANCES TO FORM A COMMON OUTPUT CHANNEL.
Claim 2
Dependent Claim
84 words
A VARIABLE PURE FLUID IMPEDANCE COMPRISING AT LEAST TWO OUTPUT CHANNELS, AN INTERACTION REGION, MEANS FOR DIRECTING FLUID THROUGH SAID INTERACTION REGION TOWARD SAID OUTPUT CHANNELS, MEANS FOR DEVELOPING IN SAID INTERACTION REGION A DIFFERENTIAL IN PRESSURE FOR DEFLECTING SAID STREAM SO AS TO VARY THE PROPORTIONS OF FLUID DIRECTED TO EACH OF SAID OUTPUT CHANNELS, MEANS LOCATED IN SAID OUTPUT CHANNELS HAVING DIFFERENT VALUES OF FLUID IMPEDANCE, SAID OUTPUT CHANNELS BEING JOINED DOWNSTREAM OF SAID FLUID IMPEDANCES TO FORM A COMMON OUTPUT CHANNEL.
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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) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |