US3616251A
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Test device
Assignee: Bayer Corp
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Filing: 1968-11-08
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Granted: 1971-10-26
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Expires: 1988-11-08
Abstract
Abstract A test device useful for the detection of a component of a fluid system comprises a water-resistant carrier, such as an organoplastic strip, containing, as an integral part thereof, a test system for the detection of such component. This test device is produced by incorporating the test system into at least a partially dissolved portion of the carrier material and then solidifying such carrier material with the test system included therein.
Inventors
- 👤 Gianni Linoli
- 👤 Enzo Sergio Mannucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:06
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N31/221; C; C12; C12Q; C12Q1/00; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/521; Y; Y10; Y10S; Y10S435/00; Y10S435/805; Y10S436/00; Y10S436/903
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
31 words
A test device according to claim 1 wherein the test system comprises an insoluble polymeric diazonium salt of an aromatic polyamine bound through an amide linkage to a cation exchange resin.
Claim 2
Dependent Claim
19 words
A test device according to claim 2 wherein the aromatic polyamine portion of the polymeric diazonium salt is o-dianisidine.
Claim 3
Dependent Claim
49 words
A test device according to claim 2 for the detection and/or determination of an enzyme wherein the test system also includes a substrate on which the enzyme can react to liberate a coupling compound which can then react with the insoluble polymeric diazonium salt to produce a color change.
Claim 4
Dependent Claim
23 words
A test device according to claim 1 wherein the test system is incorporated into at least a surface portion of the organoplastic carrier.
Claim 5
Dependent Claim
158 words
A test device according to claim 1 wherein the Test system comprises an insoluble PH sensitive reaction product which undergoes a color change with a change in pH, said reaction product being selected from the class consisting of (1) the reaction product between an insoluble polymeric diazonium salt of an aromatic polyamine bound through an amide linkage to a cation exchange resin and a suitable coupling compound, (2) the reaction product between an insoluble diazonium salt of para-aminobenzyl cellulose and a suitable coupling compound, (3) the reaction product between a polycarboxylic resin acyl halide and a compound having at least one free amino or phenolic group, (4) the reaction product between an aromatic diazonium salt and the reaction product between a polycarboxylic resin acyl halide and an aromatic polyamine, and (5) the reaction product between an insoluble polymeric material having free amino groups and a pH sensitive compound which undergoes a color change with a change in pH.
Claim 6
Dependent Claim
43 words
A test device according to claim 6 wherein the insoluble pH sensitive reaction product is the reaction product between an insoluble polymeric diazonium salt of an aromatic polyamine bound through an amide linkage to a cation exchange resin and a suitable coupling compound.
Claim 7
Dependent Claim
54 words
A test device according to claim 6 for the detection and/or determination of urea in a fluid wherein the test system includes urease and the insoluble pH sensitive reaction product between an insoluble polymeric material having free amino groups and a pH sensitive compound which undergoes a color change with a change in pH.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |