Patent US3815024A successfully refreshed from Google Patents.
US3815024A
Expired / Lapsed
US
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Particle analyzer
Assignee: General Electric Co
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Filing: 1972-02-23
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Granted: 1974-06-04
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Expires: 1992-02-23
Abstract
Abstract An apparatus and method for electrophoretically driving solution-suspended small particles through a pore in a membrane and means for counting, sizing and characterizing the particles is disclosed. The apparatus comprises a container having two chambers fitted with electrodes, filled with an electrolyte solution and separated by a partition having a membrane with a pore through which small particles are driven by an electric field. The size, number and mobility of these particles is determined by appropriate apparatus.
Inventors
- 👤 C Bean
- 👤 Blois R De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:42
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/10; G01N15/1031; G01N15/12; G01N15/13
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
90 words
An apparatus for analyzing small particles comprising: a container having a partition separating said container into two chambers, each containing an electrolyte solution, said chambers in communication with each other through a pore in a pair of membranes separated by a microporous material, said pore passing through said membrane and said microporous material; a pair of electrodes, one positioned in each chamber; electrical circuit means connected to said electrodes to electrophoretically drive particles through said pore; and electric indicating means for indicating the passage of a particle through said pore.
Claim 2
Independent Claim
90 words
An apparatus for analyzing small particles comprising: a container having a partition separating said container into two chambers, each containing an electrolyte solution, said chambers in communication with each other through a pore in a pair of membranes separated by a microporous material, said pore passing through said membrane and said microporous material; a pair of electrodes, one positioned in each chamber; electrical circuit means connected to said electrodes to electrophoretically drive particles through said pore; and electric indicating means for indicating the passage of a particle through said pore.
Claim 3
Dependent Claim
20 words
The apparatus of claim 1 wherein said pore is of a diameter in the range of 1 to 50 microns.
Claim 4
Independent Claim
65 words
A method of analyzing small particles comprising the steps of: electrophoretically driving a solution-suspended particle through a pore in a pair of membranes separated by a microporous materiAl, said pore having a substantially uniform diameter of between approximately 0.01 and 50 microns; and electrically sensing the time of passage of said article through said pore so that the mobility of said particle can be determined.
Claim 5
Independent Claim
65 words
A method of analyzing small particles comprising the steps of: electrophoretically driving a solution-suspended particle through a pore in a pair of membranes separated by a microporous materiAl, said pore having a substantially uniform diameter of between approximately 0.01 and 50 microns; and electrically sensing the time of passage of said article through said pore so that the mobility of said particle can be determined.
Claim 6
Dependent Claim
18 words
The method of claim 3 further comprising the steps of: counting and sizing particles passing through said pore.
Claim 7
Dependent Claim
26 words
The method of claim 4 further comprising the step of: categorizing particles passing through said pore by number, size and time of passage through said pore.
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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |