US3552855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser velocimeter utilizing fiber optics
Assignee: United States Department of the Air Force
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Filing: 1969-04-16
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Granted: 1971-01-05
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Expires: 1989-04-16
Abstract
Abstract A LASER VELOCIMETER COMPRISING A LASER FOR TRANSMITTING A LIGHT BEAM TO A FLOWING FLUID, WHICH SCATTERS A PORTION OF THE LIGHT BEAM, AN OPTICAL SYSTEM INCLUDING OPTICAL FIBERS BUNDLE FOR DIRECTING PORTIONS OF THE SCATTERED AND/OR UNSCATTERED LIGHT BEAM, AND A PHOTODECTECTOR FOR RECEIVING THE FIBERS BUNDLE OUTPUT IN ORDER TO OBTAIN THE FLOW VELOCITY OF THE FLUID.
Inventors
- 👤 Frank L Crosswy
- 👤 Andrew E Lennert
- 👤 Henry T Kalb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:23
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/08; H01S3/081; H01S3/083; G; G01; G01F; G01F1/00; G01F1/66; G01F1/661; G01P; G01P5/00; G01P5/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |