US3624835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microparticle analyzer employing a spherical detector array
Assignee: Bayer Corp
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Filing: 1968-11-21
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Granted: 1971-11-30
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Expires: 1988-11-21
Abstract
Abstract There is described a method and apparatus for identifying submicroscopic particles by directing the particles through a highly collimated beam of light and simultaneously measuring the light intensity at a plurality of different angles relative to the point where the particles move through the beam.
Inventors
- 👤 Philip J Wyatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:30
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/10; G01N15/14; G01N15/1456; G01N15/1459
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
150 words
A microparticle analyzer including means for generating a collimated beam of radiant energy and means to direct said beam into a predetermined location, means for introducing at least one microparticle into the radiant beam at said location, means for simultaneously detecting at a plurality of locations the spherical scattered intensity pattern produced by the microparticle in said beam and for producing an output indicative of the scattered intensity incident at each of said locations, means positioning said detecting means in a spherical surface zone at equal radial distances about said location, said detecting means including a plurality of independent detectors sufficient in number to simultaneously detect the radiant energy scattered by said microparticle in a plurality of planes all of which include the radiant energy beam and further including means for simultaneously registering the output of the plural detectors to derive the spherical radiant energy scattering pattern of said microparticle.
Claim 2
Dependent Claim
150 words
A microparticle analyzer including means for generating a collimated beam of radiant energy and means to direct said beam into a predetermined location, means for introducing at least one microparticle into the radiant beam at said location, means for simultaneously detecting at a plurality of locations the spherical scattered intensity pattern produced by the microparticle in said beam and for producing an output indicative of the scattered intensity incident at each of said locations, means positioning said detecting means in a spherical surface zone at equal radial distances about said location, said detecting means including a plurality of independent detectors sufficient in number to simultaneously detect the radiant energy scattered by said microparticle in a plurality of planes all of which include the radiant energy beam and further including means for simultaneously registering the output of the plural detectors to derive the spherical radiant energy scattering pattern of said microparticle.
Claim 3
Dependent Claim
42 words
A microparticle analyzer as set forth in claim 1 in which the means for introducing at least one microparticle into the radiant energy beam includes means for directing a stream of dispersed microparticles through the beam at substantially the same predetermined location.
Claim 4
Dependent Claim
51 words
A microparticle analyzer as set forth in claim 1 in which the plurality of detectors are positioned to substantially envelope at least one hemisphere of the radiant energy scattered by the microparticle, and in which the detectors are sufficient in number to derive a scattering pattern uniquely classifying the scattering microparticle.
Claim 5
Independent Claim
121 words
The method of analyzing microparticles which comprises the steps of introducing a stream of microparticles into a predetermined location, illuminating the microparticles with a collimated beam of radiant energy, simultaneously detecting the intensity of the radiant energy scattered by each of said microparticles over a spherical zone at a plurality of locations that are in a plurality of planes all of which planes include the radiant energy beam, simultaneously registering the intensities of the detected scattered energy for an interval of time to obtain data groups for each microparticle having the variation of the scattered intensities over a spherical range of scattering angles, digitizing said data groups and comparing said data groups with data of a number of known microparticle samples.
Claim 6
Independent Claim
121 words
The method of analyzing microparticles which comprises the steps of introducing a stream of microparticles into a predetermined location, illuminating the microparticles with a collimated beam of radiant energy, simultaneously detecting the intensity of the radiant energy scattered by each of said microparticles over a spherical zone at a plurality of locations that are in a plurality of planes all of which planes include the radiant energy beam, simultaneously registering the intensities of the detected scattered energy for an interval of time to obtain data groups for each microparticle having the variation of the scattered intensities over a spherical range of scattering angles, digitizing said data groups and comparing said data groups with data of a number of known microparticle samples.
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |