US2852693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measuring the optical properties of liquids
Assignee: Standard Oil Co
•
Filing: 1953-01-13
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Granted: 1958-09-16
•
Expires: 1973-01-13
Abstract
No abstract record available.
Inventors
- 👤 Everett C Hughes
- 👤 Jr Warren Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:31
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/63; G01N21/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD OF MEASURING AN OPTICAL PROPERTY OF A LIQUID WHICH FLUORESCES UNDER VISIBLE INCIDENT LIGHT, COMPRISING IRRADIATING A SURFACE OF THE LIQUID WITH SAID INCIDENT LIGHT, ELIMINATING FROM MEASUREMENT THE LIGHT EMITTED FROM SAID SURFACE IN DIRECTIONS OF SPECULAR REFLECTION FOR SAID INCIDENT LIGHT, AND MEASURING BY A STANDARD OF MEASURE REPRESENTING THE AVERAGE VISUAL RESPONSE OF THE HUMAN EYE THE INTENSITY OF THE LIGHT EMITTED FROM SAID LIGHT, SAID MEASURED LIGHT INCLUDING AS A PRIMARY COMPONENT THE SECONDARY LIGHT DERIVED FROM FLUORESCENE OF SAID LIQUID.
Claim 2
Independent Claim
87 words
A METHOD OF MEASURING AN OPTICAL PROPERTY OF A LIQUID WHICH FLUORESCES UNDER VISIBLE INCIDENT LIGHT, COMPRISING IRRADIATING A SURFACE OF THE LIQUID WITH SAID INCIDENT LIGHT, ELIMINATING FROM MEASUREMENT THE LIGHT EMITTED FROM SAID SURFACE IN DIRECTIONS OF SPECULAR REFLECTION FOR SAID INCIDENT LIGHT, AND MEASURING BY A STANDARD OF MEASURE REPRESENTING THE AVERAGE VISUAL RESPONSE OF THE HUMAN EYE THE INTENSITY OF THE LIGHT EMITTED FROM SAID LIGHT, SAID MEASURED LIGHT INCLUDING AS A PRIMARY COMPONENT THE SECONDARY LIGHT DERIVED FROM FLUORESCENE OF SAID LIQUID.
References Cited (Backward Citations)
US2068476A
Cited
US2046714A
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US2213138A
Cited
US2287808A
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US2263108A
Cited
US2311101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |