Patent US3320804A successfully refreshed from Google Patents.
US3320804A
Expired / Lapsed
US
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Optical fluid flowmeter
Assignee: Newtek Inc
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Filing: 1964-11-06
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Granted: 1967-05-23
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Expires: 1984-11-06
Abstract
No abstract record available.
Inventors
- 👤 Mendel M Haiberstam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:03
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/66; G01F1/661
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
AN OPTICAL FLUID FLOWMETER COMPRISING: A FLUID CONDUIT INCLUDING OPPOSED ALIGNED TRANSPARENT PORTIONS; A MASK INCLUDING A PATTERN OF AREAS OF DIFFERENT OPTICAL DENSITY ADJACENT ONE OF SAID PORTIONS; MEANS FOR ILLUMINATING THE SIDE OF SAID MASK REMOTE FROM SAID CONDUIT APPROXIMATELY UNIFORMLY; A FIRST OPTICAL SYSTEM FOR TRANSLATING THE LIGHT PASSED BY SAID MASK THROUGH SAID PORTIONS; A LIGHT-CHOPPING DEVICE; A SECOND OPTICAL SYSTEM FOR COLLECTING LIGHT DEFLECTED BY IRREGULARITIES WITHIN SAID CONDUIT ARISING FROM FLUID TURBULENCE OR INHOMOGENEITIES AND FOCUSING IT UPON SAID DEVICE; MEANS FOR SHIELDING SAID DEVICE FROM UNDEFLECTED LIGHT PASSING THROUGH SAID PORTIONS; AND PHOTOSENSITIVE MEANS RESPONSIVE TO THE LIGHT PASSING THROUGH SAID DEVICE FOR DEVELOPING AN EFFECT REPRESENTATIVE OF FLUID VELOCITY.
Claim 2
Dependent Claim
117 words
AN OPTICAL FLUID FLOWMETER COMPRISING: A FLUID CONDUIT INCLUDING OPPOSED ALIGNED TRANSPARENT PORTIONS; A MASK INCLUDING A PATTERN OF AREAS OF DIFFERENT OPTICAL DENSITY ADJACENT ONE OF SAID PORTIONS; MEANS FOR ILLUMINATING THE SIDE OF SAID MASK REMOTE FROM SAID CONDUIT APPROXIMATELY UNIFORMLY; A FIRST OPTICAL SYSTEM FOR TRANSLATING THE LIGHT PASSED BY SAID MASK THROUGH SAID PORTIONS; A LIGHT-CHOPPING DEVICE; A SECOND OPTICAL SYSTEM FOR COLLECTING LIGHT DEFLECTED BY IRREGULARITIES WITHIN SAID CONDUIT ARISING FROM FLUID TURBULENCE OR INHOMOGENEITIES AND FOCUSING IT UPON SAID DEVICE; MEANS FOR SHIELDING SAID DEVICE FROM UNDEFLECTED LIGHT PASSING THROUGH SAID PORTIONS; AND PHOTOSENSITIVE MEANS RESPONSIVE TO THE LIGHT PASSING THROUGH SAID DEVICE FOR DEVELOPING AN EFFECT REPRESENTATIVE OF FLUID VELOCITY.
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) | 1970-05-22 | 1970-11-21 | 1971-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-22 | 1974-11-21 | 1975-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-22 | 1978-11-21 | 1979-05-23 | $7700.00 | Window Closed / Lapsed |