US3595531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixer apparatus
Assignee: Dow Chemical Co
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Filing: 1969-11-04
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Granted: 1971-07-27
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Expires: 1989-11-04
Abstract
Abstract This invention relates to apparatus for use in indicating the presence of substances in a small stream of liquid, and particularly to mixing apparatus for use in connection with chromatographic apparatus utilizing microcolumns. The apparatus is a spherical chamber having a close-fitting ball therein, a pair of inputs and an output. The ball is nonreactive with the materials to be mixed and has a magnet embedded therein. The sphere is in two parts to permit easy cleaning and/or replacement of the ball. External magnetic means cause rotation of the ball.
Inventors
- 👤 Alan J Williams
- 👤 Charles J Starnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:24
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/84; B; B01; B01F; B01F33/00; B01F33/45; B01F33/452; G01N30/26; G01N30/28; G01N30/34; G01N2030/347
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
122 words
Apparatus for mixing very small volumes of fluids, comprising a two part body which, when the parts are joined in operative relationship, has a spherical chamber therein, a spherical element having magnetic means incorporated therein, said element having a diameter such that it fits closely but loosely slidably within said spherical chamber, said element being made of a material which is nonreactive with materials to be mixed in said apparatus, means for introducing materials to be mixed to said chamber, means remote from said means for introducing materials for withdrawing mixed materials from said chamber, means for joining said body parts together in a fluidtight manner, and means for imposing a moving magnetic field on said spherical element to induce rotation thereof.
Claim 2
Dependent Claim
122 words
Apparatus for mixing very small volumes of fluids, comprising a two part body which, when the parts are joined in operative relationship, has a spherical chamber therein, a spherical element having magnetic means incorporated therein, said element having a diameter such that it fits closely but loosely slidably within said spherical chamber, said element being made of a material which is nonreactive with materials to be mixed in said apparatus, means for introducing materials to be mixed to said chamber, means remote from said means for introducing materials for withdrawing mixed materials from said chamber, means for joining said body parts together in a fluidtight manner, and means for imposing a moving magnetic field on said spherical element to induce rotation thereof.
Claim 3
Dependent Claim
15 words
Apparatus in accordance with claim 1, wherein said body is made of a vitreous material.
Claim 4
Dependent Claim
29 words
Apparatus in accordance with claim 1, wherein said body parts having mating ends with a hemispherially shaped surface extending inwardly therefrom, said parts being joined at said mating ends.
Claim 5
Dependent Claim
25 words
Apparatus in accordance with claim 1, wherein said means for imposing a moving magnetic field comprises a rotatable magnet disposed adjacent to said body part.
Claim 6
Dependent Claim
18 words
Apparatus in accordance with claim 1, wherein said magnetic means in said spherical element is a bar magnet.
Claim 7
Dependent Claim
23 words
Apparatus in accordance with claim 1, wherein said means for joining said body parts together comprises a fluid impervious tightly adhering tapelike element.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |