Patent US4727492A successfully refreshed from Google Patents.
US3950134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Assay machine and method
Assignee: Leland Stanford Junior University
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Filing: 1974-09-20
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Granted: 1976-04-13
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Expires: 1994-09-20
Abstract
Abstract An apparatus for conducting chemical assays features a coiled soft plastic tube as a reaction chamber. Along the length of the plastic tubing is a slit therein through which a needle-like member of a travelling dispenser injects samples to be analyzed. The injected samples may react with a reactant previously deposited in the interior of the plastic tube. The apparatus is applicable to carrying out radioimmunoassays.
Inventors
- 👤 Laughton E. M. Miles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:24
CPC Classifications
B; B01; B01L; B01L3/00; Y; Y10; Y10S; Y10S436/00; Y10S436/804; Y10S436/807
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
65 words
An apparatus for conducting chemical assays comprising in combination: a. a length of a flexible, soft plastic tubing, b. a slit running the length of said tubing, c. means for holding said tubing in a coiled configuration, d. dispensing means including a needle-like member extending in self-sealing relationship into said slit, and e. means for moving said dispensing means through the slit in said tubing.
Claim 2
Independent Claim
65 words
An apparatus for conducting chemical assays comprising in combination: a. a length of a flexible, soft plastic tubing, b. a slit running the length of said tubing, c. means for holding said tubing in a coiled configuration, d. dispensing means including a needle-like member extending in self-sealing relationship into said slit, and e. means for moving said dispensing means through the slit in said tubing.
Claim 3
Dependent Claim
16 words
The apparatus of claim 1 wherein the soft plastic tubing is wound on a threaded drum.
Claim 4
Dependent Claim
21 words
The apparatus of claim 1 wherein the soft plastic tubing is wound on a flat disc with a helical groove therein.
Claim 5
Dependent Claim
46 words
The apparatus of claim 2 having means for rotating said drum on its axis and having an auxiliary device mounted for movement adjacent to the drum parallel to its axis and means for traversing the auxiliary device in synchronism with the lead of the threaded drum.
Claim 6
Dependent Claim
16 words
The apparatus of claim 4 wherein said auxiliary device carries the dispensing means of paragraph (d).
Claim 7
Independent Claim
69 words
A method of conducting an assay comprising the steps of: a. providing an elongated continuous chamber, b. depositing within said chamber throughout the length thereof a solid reactant, c. injecting a liquid reactant in said chamber along the length of said chamber in a continuous manner, and d. moving an analysis device along said chamber to analyze the results of the reaction between said solid and said liquid reactants.
Claim 8
Independent Claim
69 words
A method of conducting an assay comprising the steps of: a. providing an elongated continuous chamber, b. depositing within said chamber throughout the length thereof a solid reactant, c. injecting a liquid reactant in said chamber along the length of said chamber in a continuous manner, and d. moving an analysis device along said chamber to analyze the results of the reaction between said solid and said liquid reactants.
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) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |