Patent US4806487A successfully refreshed from Google Patents.
US4806487A
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Basic drug detection method
Assignee: Analytical Innovations Inc
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Filing: 1987-05-29
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Granted: 1989-02-21
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Expires: 2007-05-29
Abstract
Abstract A method for detecting basic narcotics or drugs in body fluids which comprises filtering body fluids through a cellulosic filtering means treated with a binding agent for the narcotics or drugs and the filtering means. The binding agent is a polycarboxylic acid. The narcotics or drugs are then treated with a subsequent reagent to produce a color reaction. A device for detecting basic narcotics or drugs in also disclosed which contains the filtering means treated with the binding agent so as to concentrate the narcotic or drug prior to reaction with a suitable indicator.
Inventors
- 👤 Susan Akers
- 👤 Raymond F. Akers, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:12
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/75; G01N21/77; G01N21/78; G01N33/00; G01N33/48; G01N33/50; G01N33/94; Y; Y10; Y10S; Y10S436/00; Y10S436/901; Y10T; Y10T436/00; Y10T436/14; Y10T436/141111; Y10T436/142222; Y10T436/145555; Y10T436/147777; Y10T436/25; Y10T436/25375; Y10T436/255
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
158 words
A method for analyzing a sample of a body fluid for the presence of a basic drug which comprises: filtering a sample of a body fluid through a cellulosic filtering means which has been treated with a binding agent for said filtering means and a basic drug so that any of said basic drug in said sample binds to said filtering means, said binding agent being a compound having the formula HOOC--R--COOH wherein R is selected from the group consisting of a cycloalkyl group having 4 to 6 carbon atoms, an alkyl group having 2 to 12 carbon atoms, an alkylene group having 2 to 12 carbon atoms, a heterocyclic group having five or six carbon atoms, and a phenyl group; contacting said filtering means with a color indicator for said basic drug; and observing the filtering means for any color change, wherein any color change is indicative of the presence of said basic drug in said sample.
Claim 2
Independent Claim
158 words
A method for analyzing a sample of a body fluid for the presence of a basic drug which comprises: filtering a sample of a body fluid through a cellulosic filtering means which has been treated with a binding agent for said filtering means and a basic drug so that any of said basic drug in said sample binds to said filtering means, said binding agent being a compound having the formula HOOC--R--COOH wherein R is selected from the group consisting of a cycloalkyl group having 4 to 6 carbon atoms, an alkyl group having 2 to 12 carbon atoms, an alkylene group having 2 to 12 carbon atoms, a heterocyclic group having five or six carbon atoms, and a phenyl group; contacting said filtering means with a color indicator for said basic drug; and observing the filtering means for any color change, wherein any color change is indicative of the presence of said basic drug in said sample.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said binding agent is maleic acid.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein said binding agent is adipic acid.
Claim 5
Dependent Claim
11 words
The method of claim 1 wherein said body fluid is urine.
Claim 6
Dependent Claim
22 words
The method of claim 1 wherein said color indicator is selected from the group consisting of cobaltous thiocyanate and tetrabromophenolphthalein ethyl ester.
Claim 7
Dependent Claim
13 words
The method of claim 1 wherein said filtering means is a filtering disk.
Claim 8
Dependent Claim
28 words
The method of claim 6 wherein said disk comprises a plurality of layers, at least one of said layers being a cellulosic layer treated with said binding agent.
Claim 9
Independent Claim
226 words
A method for analyzing a sample of a body fluid for the presence of cannabinoids and a basic drug which comprises: filtering a sample of a body fluid through a filtering means comprising a first cellulosic layer which has been treated with a binding agent for said first cellulosic layer and a basic drug and a second cellulosic layer impregnated with an acidic organic indicator for cannabinoids so that any of said basic drug in said sample binds to said first cellulosic layer and any cannabinoids in said sample reacts with said acidic organic indicator in said second cellulosic layer to produce a color change, said binding agent being a compound having the formula HOOC--R--COOH wherein R is selected from the group consisting of a cycloalkyl group having 4 to 6 carbon atoms, an alkyl group having 2 to 12 carbon atoms, an alkylene group having 2 to 12 carbon atoms, a heterocyclic group having five or six carbon atoms, and a phenyl group; observing the second cellulosic layer for any color change, wherein any color change is indicative of the presence of cannabinoids in said sample; contacting said first cellulosic layer with a color indicator for said basic drug; and observing the first cellulosic layer for any color change, wherein any color change is indicative of the presence of said basic drug in said sample.
Claim 10
Independent Claim
226 words
A method for analyzing a sample of a body fluid for the presence of cannabinoids and a basic drug which comprises: filtering a sample of a body fluid through a filtering means comprising a first cellulosic layer which has been treated with a binding agent for said first cellulosic layer and a basic drug and a second cellulosic layer impregnated with an acidic organic indicator for cannabinoids so that any of said basic drug in said sample binds to said first cellulosic layer and any cannabinoids in said sample reacts with said acidic organic indicator in said second cellulosic layer to produce a color change, said binding agent being a compound having the formula HOOC--R--COOH wherein R is selected from the group consisting of a cycloalkyl group having 4 to 6 carbon atoms, an alkyl group having 2 to 12 carbon atoms, an alkylene group having 2 to 12 carbon atoms, a heterocyclic group having five or six carbon atoms, and a phenyl group; observing the second cellulosic layer for any color change, wherein any color change is indicative of the presence of cannabinoids in said sample; contacting said first cellulosic layer with a color indicator for said basic drug; and observing the first cellulosic layer for any color change, wherein any color change is indicative of the presence of said basic drug in said sample.
Claim 11
Dependent Claim
14 words
The method of claim 8 wherein said acidic organic indicator is Fast Blue BB.
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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) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |