US4062652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reagent unit intended for microanalyses of standard type and device and method for its production
Assignee: Individual
•
Filing: 1974-06-27
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Granted: 1977-12-13
•
Expires: 1994-06-27
Abstract
Abstract A prefabricated micro-quantity reagent dosage unit for an analytical procedure, is provided involving reaction of a chemical reagent with a reaction mixture to be analyzed. The unit comprises a composite structure which incorporates the chemical reagent and includes carrier means for carrying the chemical reagent and magnetizable material to facilitate handling of the carrier means and for effecting movement of the latter, under action of a magnetic field acting on the magnetizable material, when the carrier means is subjected to the reaction mixture. The carrier means is provided with precise micro-quantities of reagent preparatory to a single analysis and by virtue of the magnetizable material the composite structure may readily be handled for storage under conditions favorable for the durability of the reagent, simultaneously enabling transfer of the composite structure to the reaction mixture without risk of contamination of the latter.
Inventors
- 👤 Gudrun Birgitta Margareta Rolfo-Fontana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:50
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N31/00; G01N31/20; G01N33/50; G01N33/96; G01N35/00; G01N35/02; Y; Y10; Y10S; Y10S206/00; Y10S206/818
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
142 words
A prefabricated micro-quantity reagent dosage unit for use in the course of an analytical procedure involving reaction of a chemical reagent with a reaction mixture to be analyzed, said unit comprising a chemical reagent of predetermined volume, a tube open at both its ends for carrying therewithin said chemical reagent of predetermined volume, sealing means cooperating with said tube for sealingly containing said reagent therein during storage, and a magnetizable material embedded in the wall of said tube to facilitate handling of said tube and for effecting movement of the tube, and thus the reagent carried thereby, when subjected to said reaction mixture, said tube, said reagent, said sealing means and said magnetizable material comprising a composite structure adapted for storage, transfer and use in a single analytical procedure under action of magnetic forces adapted to be applied to said magnetizable material.
Claim 2
Dependent Claim
142 words
A prefabricated micro-quantity reagent dosage unit for use in the course of an analytical procedure involving reaction of a chemical reagent with a reaction mixture to be analyzed, said unit comprising a chemical reagent of predetermined volume, a tube open at both its ends for carrying therewithin said chemical reagent of predetermined volume, sealing means cooperating with said tube for sealingly containing said reagent therein during storage, and a magnetizable material embedded in the wall of said tube to facilitate handling of said tube and for effecting movement of the tube, and thus the reagent carried thereby, when subjected to said reaction mixture, said tube, said reagent, said sealing means and said magnetizable material comprising a composite structure adapted for storage, transfer and use in a single analytical procedure under action of magnetic forces adapted to be applied to said magnetizable material.
Claim 3
Dependent Claim
32 words
The reagent dosage unit of claim 1, wherein said reagent is formulated with viscosity raising substances selected from the group consisting of agar-agar, pectins, gelatin and cellulose derivatives to form a gel.
Claim 4
Dependent Claim
23 words
The reagent dosage unit of claim 1, wherein the reagent is deposited upon a plastic band inserted and enclosed within the carrier tube.
Claim 5
Dependent Claim
18 words
The reagent dosage unit of claim 1, wherein said reagent has a volume of less than 30 μl.
Claim 6
Dependent Claim
23 words
The unit according to claim 1, wherein the tube is of plastic material and said sealing means comprises end closures for the tube.
Claim 7
Dependent Claim
25 words
The unit according to claim 1, incorporated in an airtight cassette adapted for ready dispensation of unit dosage elements in sequence into said reaction mixture.
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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) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |