US3448406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser fluid flow sensor insensitive to rotation
Assignee: Unisys Corp
•
Filing: 1966-04-05
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Granted: 1969-06-03
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Expires: 1986-04-05
Abstract
No abstract record available.
Inventors
- 👤 Robert E Mcclure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:39
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/08; H01S3/081; H01S3/083; G; G01; G01F; G01F1/00; G01F1/66; G01F1/661
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
A DEVICE FOR SENSING FLUID FLOW COMPRISING A CONDUIT HAVING AN AXIS ALONG WHICH SAID FLUID FLOW OCCURS, SAID CONDUIT BEING TRANSPARENT AT A PLURALITY OF POINTS TO PERMIT CROSSED LIGHT BEAMS TO PROPAGATE ACROSS SAID CONDUIT AT OTHER THAN RIGHT ANGLES RELATIVE TO SAID AXIS, A RING LASER HAVING A CLOSED LOOP RESONANT CAVITY COMPRISING TWO COMPONENT TRIANGULAR CLOSED LOOPS TOGETHER CONFORMING GENERALLY TO THE FIGURE EIGHT, FOUR SIDES OF SAID TWO TRIANGULAR CLOSED LOOPS CONSTITUTING THE OPTICAL PATHS FOR SAID CROSSED BEAMS.
References Cited (Backward Citations)
US2993373A
Cited
US3382758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |