Process for automatic counting and measurement of particles
Patent 4021117 Issued on May 3, 1977. Estimated Expiration Date: 
May 3, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 3, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3861800 Method and apparatus for providing primary coincidence correction during particle analysis utilizing time generation techniques Method and apparatus for providing primary coincidence correction during particle analysis Patent #: 3938038 InventorsApplicationNo. 05/602750 filed on 08/07/1975US Classes:356/39, BLOOD ANALYSIS356/335, FOR SIZE OF PARTICLES377/10, Field of view contains plural entities or entities scanned plural times (e.g., microscopic particles)377/50, Compensation for excess or shortage of pulses702/26By particle countExaminersPrimary: McGraw, Vincent P.Attorney, Agent or FirmAbstractA method of counting and analyzing pulses representative of characteristics of particles passing through a detector device including detecting the amplitude of each pulse, measuring the area under each pulse and above a reference level, deriving a ratio of amplitude to measured area, and determining which pulses have a ratio over a selected threshold as an indication of simultaneous passage of more than one pulse through the sensing zone of the detector device.Field of SearchBLOOD ANALYSIS | |
