Patent US4844866A successfully refreshed from Google Patents.
US4844866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carrier for detecting drug abuse compounds
Assignee: Matrix Technologies Inc
•
Filing: 1984-11-13
•
Granted: 1989-07-04
•
Expires: 2004-11-13
Abstract
Abstract A carrier for detecting drug abuse compounds which changes color upon contact with such compounds. Metabolites of abusable drugs such as natural opiates, i.e., morphine and heroin, are qualitatively and semi-quantitatively detected in physiological fluids by the use of the carrier which has been treated with certain stain-producing components adapted to react with the dug abuse compound residues to form colored products and which may be enhanced by intense light and/or heat.
Inventors
- 👤 Jack E. Wallace
- 👤 Kenneth Blum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:25
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/94; G01N33/9486; G01N33/52; G01N33/521; G01N33/523; Y; Y10; Y10T; Y10T436/00; Y10T436/14; Y10T436/141111
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A carrier for testing body fluid specimens to indicate the presence of natural opiates and synthetic analogs of similar chemical structures consisting of a supporting surface, a composition applied to said supporting surface adapted to react with said body fluid specimens to develop an intense color indication for said opiates, said composition comprising a 2-6% solution of potassium ferricyanide buffered in a boric acid-sodium borate solution to pH 8.8.
Claim 2
Dependent Claim
69 words
A carrier for testing body fluid specimens to indicate the presence of natural opiates and synthetic analogs of similar chemical structures consisting of a supporting surface, a composition applied to said supporting surface adapted to react with said body fluid specimens to develop an intense color indication for said opiates, said composition comprising a 2-6% solution of potassium ferricyanide buffered in a boric acid-sodium borate solution to pH 8.8.
References Cited (Backward Citations)
US3955926A
Cited
US3761227A
Cited
US3915639A
Cited
US3912655A
Cited
US4013417A
Cited
US3980434A
Cited
WO1984002397A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |