US3733136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measuring the degree of assymetry of non-spherical particles
Assignee: Individual
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Filing: 1971-07-12
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Granted: 1973-05-15
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Expires: 1991-07-12
Abstract
Abstract Method and apparatus for measuring the degree of assymetry of non-spherical particles (e.g., erythrocytes, i.e., red blood cells) wherein the particles are suspended in a light-transparent medium, the medium is mixed to cause the particles to rotate while light is projected through the medium, and the differences in the profiles of the particles to the light when the particles move at different angles to the path of the light through the medium are detected to provide an indication of the degree of assymetry of the particles.
Inventors
- 👤 Furedi A Porath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:40
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/02; G01N15/0205
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
50 words
A method as defined in claim 1, wherein said suspended particles and light-transparent medium are caused to rotate in a light-transparent container, and the differences in the profiles are detected by detecting the amount of light exiting from the container at different distances laterally of the axis of rotation thereof.
Claim 2
Dependent Claim
39 words
A method as defined in claim 2, wherein said particles are rotated about a fixed axis of rotation, and said detection is made simultaneously at at least two discrete poiNts at different distances laterally of said axis of rotation.
Claim 3
Dependent Claim
33 words
The method as defined in claim 2, wherein said particles are rotated about a fixed axis of rotation, and said detection is made by moving a detector laterally of said axis of rotation.
Claim 4
Dependent Claim
27 words
The method as defined in claim 2, wherein said detection is made by moving the axis of rotation of the suspended particles with respect to the detector.
Claim 5
Dependent Claim
122 words
Apparatus for measuring the degree of assymetry of non-spherical particles, comprising, a transparent container for receiving a sample of the particles suspended in a light-transparent medium, a light source at one side of the container, rotating means for causing said suspended particles to rotate in said container and light detector means at the other side of said container for detecting the amount of light exiting from the medium at different distances laterally of the axis of rotation thereof, said detected differences resulting from the differences in the profiles of the particles to the light when the particles move at different angles to the path of light through the medium and thereby being an indication of the degree of assymetry of the particles.
Claim 6
Dependent Claim
28 words
Apparatus as defined in claim 6, wherein said light detector means comprises separate light detectors placed at different distances laterally of the axis of rotation of the particles.
Claim 7
Dependent Claim
29 words
Apparatus as defined in claim 6, wherein said light detector means comprises a light detector and means for moving same laterally of the axis of rotation of the particles.
Claim 8
Dependent Claim
33 words
Apparatus as defined in claim 6, wherein said light detector means comprises a stationary light detector and means for moving the axis of rotation of the particles laterally with respect to said detector.
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |