Patent US2307181A successfully refreshed from Google Patents.
US4456513A
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Method of and apparatus for measuring electrophoretic mobility
Assignee: Kureha Corp
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Filing: 1982-08-25
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Granted: 1984-06-26
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Expires: 2002-08-25
Abstract
Abstract In the method of and apparatus for measuring the electrophoretic mobility, the electrophoretic mobility for the particles in a test sample is determined by measuring the apparent electrophoretic mobility at the positions for each of a plurality of different particles contained in the test sample moving under the electric field, and substituting the position for the stationary plane at which the flow velocity due to electroosmotic effect is zero into the theoretical curve (M(x)=-FX2+AX+B based on the measured data.
Inventors
- 👤 Yoshio Kawai
- 👤 Toshiharu Shirakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:57
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
101 words
A method of measuring the electrophoretic mobility of particles, comprising measuring the position Xj for each of the particles contained in a test sample, applying an electric field to the test sample to measure the apparent electrophoretic mobility Mj at the position Xj for each of the particles, and substituting the position for the stationary plane at which the flow velocity due to the electroosmotic effect is zero into the theoretical curve M(x)=-FX 2 +AX+B on the basis of the position Xj and the apparent electrophoretic mobility Mj for the measured particles to determine the true electrophoretic mobility for the particles.
Claim 2
Independent Claim
101 words
A method of measuring the electrophoretic mobility of particles, comprising measuring the position Xj for each of the particles contained in a test sample, applying an electric field to the test sample to measure the apparent electrophoretic mobility Mj at the position Xj for each of the particles, and substituting the position for the stationary plane at which the flow velocity due to the electroosmotic effect is zero into the theoretical curve M(x)=-FX 2 +AX+B on the basis of the position Xj and the apparent electrophoretic mobility Mj for the measured particles to determine the true electrophoretic mobility for the particles.
Claim 3
Dependent Claim
29 words
A method according to claim 1, wherein the theoretical curve M(x)=-FX 2 +AX+B is determined by the position Xj and the apparent electrophoretic mobility Mj for the measured particles.
Claim 4
Independent Claim
107 words
An apparatus for measuring the electrophoretic mobility of particles, comprising means for measuring the position Xj for each of the particles contained in a test sample, means for applying an electric field to the test sample to measure the apparent electrophoretic mobility Mj at the position Xj for each of the particles, and means for substituting the position for the stationary plane at which the flow velocity due to the electroosmotic effect is zero into the theoretical curve M(x)=-FX 2 +AX+B on the basis of the position Xj and the apparent electrophoretic mobility Mj for the measured particles to determine the true electrophoretic mobility for the particles.
Claim 5
Independent Claim
107 words
An apparatus for measuring the electrophoretic mobility of particles, comprising means for measuring the position Xj for each of the particles contained in a test sample, means for applying an electric field to the test sample to measure the apparent electrophoretic mobility Mj at the position Xj for each of the particles, and means for substituting the position for the stationary plane at which the flow velocity due to the electroosmotic effect is zero into the theoretical curve M(x)=-FX 2 +AX+B on the basis of the position Xj and the apparent electrophoretic mobility Mj for the measured particles to determine the true electrophoretic mobility for the particles.
Claim 6
Dependent Claim
29 words
An apparatus according to claim 3, wherein the theoretical curve M(x)=-FX 2 +AX+B is determined by the position Xj and the apparent electrophoretic mobility Mj for the measured particles.
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) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |