US4020006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid containing dispersed particles simulating leukocytes and method for producing same
Assignee: ICL SCIENTIFIC Inc
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Filing: 1975-08-14
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Granted: 1977-04-26
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Expires: 1995-08-14
Abstract
Abstract Microspores derived from flowering plants are dispersed in fluids to simulate leukocytes. Reconstituted body fluids utilized as standards in clinical examination of fluids such as urine contain a known quantity of microspores to simulate leukocytes when examined under a high power field. Microspores utilized to simulate leukocytes have a particle size of between 10 microns and 25 microns and are stained utilizing the same stains and techniques utilized for staining leukocytes. Microspores derived from the Paper Mulberry tree are highly preferred for use as leukocyte resembling particles.
Inventors
- 👤 James E. Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:13
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/96; G01N2496/00; G01N2496/05; Y; Y10; Y10T; Y10T436/00; Y10T436/10; Y10T436/101666; Y10T436/104998; Y10T436/105831
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
130 words
In a method for preparing a standard body fluid for use as a control in clinical testing comprising the steps of introducing materials into a body fluid to bring the proportion of constituent components to a predetermined level followed by lyophilization to remove the liquid phase therefrom and adding liquid to reconstitute the lyophilized sample prior to its use, the improvement comprising: introducing into said standard body fluid a predetermined amount of particles simulating leukocytes, said particles consisting of the microspores of plants selected from the group consisting of Broussonetia papyrifera, Morus albus and Carya illinoensis, said microspores having a particle size ranging between about 10 microns and about 25 microns and being reactive with a biological tissue staining compound for staining leukocytes to reveal a defined nucleus and cytoplasm.
Claim 2
Dependent Claim
130 words
In a method for preparing a standard body fluid for use as a control in clinical testing comprising the steps of introducing materials into a body fluid to bring the proportion of constituent components to a predetermined level followed by lyophilization to remove the liquid phase therefrom and adding liquid to reconstitute the lyophilized sample prior to its use, the improvement comprising: introducing into said standard body fluid a predetermined amount of particles simulating leukocytes, said particles consisting of the microspores of plants selected from the group consisting of Broussonetia papyrifera, Morus albus and Carya illinoensis, said microspores having a particle size ranging between about 10 microns and about 25 microns and being reactive with a biological tissue staining compound for staining leukocytes to reveal a defined nucleus and cytoplasm.
Claim 3
Dependent Claim
38 words
The method of claim 1 wherein said body fluid is urine and said microspores are added in an amount sufficient to provide a value of between about 1 and about 100 microspores under high power field at 430X.
Claim 4
Dependent Claim
21 words
The method as defined in claim 1 wherein said microspores are dispersed in said liquid utilized for reconstituting the body fluid.
Claim 5
Dependent Claim
21 words
The method as defined in claim 1 wherein said microspores are introduced into the body fluid prior to the lyophilization step.
Claim 6
Dependent Claim
21 words
The method as defined in claim 1 wherein said microspores are introduced into the lyophilized portion prior to the reconstitution step.
Claim 7
Dependent Claim
87 words
A preparation for use in forming a reconstituted body fluid standard for use as a control in clinical testing, said preparation consisting of a body fluid in the anhydrous form having predetermined constituent amounts and a predetermined amount of a plurality of plant microspores having a particle size of between 10 and 25 microns, said microspores being selected from the group consisting of Broussonetia papyrifera, Morus albus and Carya illinoensis, said microspores resembling leukocytes and revealing a nucleus and cytoplasm when contacted with a leukocyte staining compound.
Claim 8
Dependent Claim
87 words
A preparation for use in forming a reconstituted body fluid standard for use as a control in clinical testing, said preparation consisting of a body fluid in the anhydrous form having predetermined constituent amounts and a predetermined amount of a plurality of plant microspores having a particle size of between 10 and 25 microns, said microspores being selected from the group consisting of Broussonetia papyrifera, Morus albus and Carya illinoensis, said microspores resembling leukocytes and revealing a nucleus and cytoplasm when contacted with a leukocyte staining compound.
Claim 9
Dependent Claim
11 words
The preparation of claim 6 wherein said body fluid is urine.
Claim 10
Independent Claim
69 words
A method for preparing a dispersion comprising artifical leukocytes, for use as a control in clinical testing, said method comprising: introducing into a body fluid having predetermined constituent amounts, a predetermined amount of particles consisting of plant originated microspores derived from Broussonetia papyrifera, said particles having a size ranging from between 10 microns and 25 microns and displaying a nucleus and cytoplasm when contacted with a leukocyte staining compound.
Claim 11
Independent Claim
69 words
A method for preparing a dispersion comprising artifical leukocytes, for use as a control in clinical testing, said method comprising: introducing into a body fluid having predetermined constituent amounts, a predetermined amount of particles consisting of plant originated microspores derived from Broussonetia papyrifera, said particles having a size ranging from between 10 microns and 25 microns and displaying a nucleus and cytoplasm when contacted with a leukocyte staining compound.
Claim 12
Dependent Claim
31 words
The method as defined in claim 8 wherein said body fluid is a reconstituted body fluid selected from the group consisting of urine, blood serum, plasma, spinal fluid and joint fluid.
Claim 13
Dependent Claim
38 words
The method as defined in claim 8 wherein said body fluid comprises a reconstituted body fluid and said particles are dispersed therein in an amount sufficient to provide a predetermined value when examined under a high power field.
Claim 14
Dependent Claim
14 words
The method as defined in claim 8 wherein said body fluid is reconstituted urine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |