US4728500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stirrer for biochemical reactions
Assignee: TOYO SODA MANUFACTURING Co Ltd 4560 OAZA TONDA SHINNANYO-SHI YAMI-KEN JAPAN
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Filing: 1986-08-06
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Granted: 1988-03-01
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Expires: 2006-08-06
Abstract
Abstract A stirrer for biochemical reactions comprising a magnetically permeable vessel for containing a solution of biochemically reacting substances, at least one magnetic bead placed in the vessel, and a magnetic device which is installed outside the vessel and generates an oscillating magnetic field acting on the bead. The stirrer is advantageous for stirring the solution of biochemically reacting substances for biochemical reactions without direct contact.
Inventors
- 👤 Yuji Higo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:24
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/0098; B; B01; B01F; B01F31/00; B01F31/44; B01F31/441; B01F33/00; B01F33/45; B01F33/452; G01N1/00; G01N1/02; G01N1/10; G01N2001/1006; Y; Y10; Y10S; Y10S366/00; Y10S366/03
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
113 words
A stirrer for biochemical reactions, comprising: at least one vessel formed of magnetically permeable material for containing a solution of a biochemically reactive substance; at least one magnetic bead positionable in each said at least one vessel; means for generating a regularly oscillating magnetic field in each said at least one vessel for oscillating said at least one bead, said generating means comprising a bar having pieces of magnet implanted thereon and positioned relative to said at least one vessel so as to magnetically affect said at least one bead in said at least one vessel, and drive means for regularly oscillating said bar, whereby said at least one bead is regularly oscillated.
Claim 2
Dependent Claim
113 words
A stirrer for biochemical reactions, comprising: at least one vessel formed of magnetically permeable material for containing a solution of a biochemically reactive substance; at least one magnetic bead positionable in each said at least one vessel; means for generating a regularly oscillating magnetic field in each said at least one vessel for oscillating said at least one bead, said generating means comprising a bar having pieces of magnet implanted thereon and positioned relative to said at least one vessel so as to magnetically affect said at least one bead in said at least one vessel, and drive means for regularly oscillating said bar, whereby said at least one bead is regularly oscillated.
Claim 3
Dependent Claim
43 words
The stirrer of claim 1 including means for supporting a plurality of said vessels, wherein said bar comprises a plurality of commonly connected bar portions, each of said bar portions extending beneath at least one of said vessels supported by said supporting means.
Claim 4
Dependent Claim
28 words
The stirrer of claim 1 including an antibody fixed on said at least one bead, whereby said at least one bead comprises an insoluble carrier of said antibody.
Claim 5
Dependent Claim
43 words
The stirrer of claim 3 including means for supporting a plurality of said vessels, wherein said bar comprises a plurality of commonly connected bar portions, each of said bar portions extending beneath at least one of said vessels supported by said supporting means.
References Cited (Backward Citations)
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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) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |