Patent US4353984A successfully refreshed from Google Patents.
US4353984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and test piece for measuring glucose concentration in body fluids
Assignee: Arkray Inc
•
Filing: 1980-01-04
•
Granted: 1982-10-12
•
Expires: 2000-01-04
Abstract
Abstract A composition and test piece or dipstick for measuring the glucose concentration in body fluids such as urine, spinal fluid and blood. The composition includes a glucose oxidase, a peroxidase a N,N'-tetramethyldiaminophenylmethane and guaiac.
Inventors
- 👤 Shigeki Yamada
- 👤 Takao Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:42
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/54; Y; Y10; Y10S; Y10S435/00; Y10S435/805; Y10T; Y10T436/00; Y10T436/14; Y10T436/142222; Y10T436/143333; Y10T436/144444; Y10T436/20; Y10T436/203332
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
14 words
A diagnostic composition which comprises a glucose oxidase, a peroxidase, a N,N'-tetramethyldiaminophenylmethane and guaiac.
Claim 2
Dependent Claim
14 words
A diagnostic composition which comprises a glucose oxidase, a peroxidase, a N,N'-tetramethyldiaminophenylmethane and guaiac.
Claim 3
Dependent Claim
13 words
A composition as claimed in claim 1 wherein said N,N'-tetramethyldiaminophenylmethane comprises N,N'-tetramethyl 3,3'-diaminophenylmethane.
Claim 4
Dependent Claim
12 words
A composition as claimed in claim 1 wherein said N,N'-tetramethyldiaminophenylmethane comprises N,N'-tetramethyl-4,4'-diaminophenylmethane.
Claim 5
Dependent Claim
30 words
A composition as claimed in claim 3 wherein said guaiac and said N,N'-tetramethyl 4,4'-diaminophenylmethane are present in said composition in a weight ratio of from about 1:1 to about 1:10.
Claim 6
Dependent Claim
27 words
A composition as claimed in claim 4, wherein said guaiac and said N,N'-tetramethyl 4,4'-diaminophenylmethane are present in a weight ratio of from about 1:2 to about 1:4.
Claim 7
Dependent Claim
12 words
A composition as claimed in claim 5 further comprising a buffering agent.
Claim 8
Dependent Claim
28 words
A composition as claimed in claim 4 or 5 wherein said guaiac is selected from the group consisting of guaiac resin, guaiaconic acid, guaiarethene acid and guaiac acid.
Claim 9
Dependent Claim
12 words
A composition as claimed in any of claims 3-5 further comprising polyvinylbutyral.
Claim 10
Dependent Claim
21 words
A test piece comprising a substrate supporting a diagnostic composition which comprises a glucose oxidase, a peroxidase, guaiac and a N,N'-tetramethyldiaminophenylmethane.
Claim 11
Dependent Claim
21 words
A test piece comprising a substrate supporting a diagnostic composition which comprises a glucose oxidase, a peroxidase, guaiac and a N,N'-tetramethyldiaminophenylmethane.
Claim 12
Dependent Claim
13 words
A test piece as claimed in claim 9 wherein said N,N'-tetramethyldiaminophenylmethane comprises N,N'-tetramethyl-4,4'-diaminophenylmethane.
Claim 13
Dependent Claim
11 words
A test piece as claimed in claim 10 further comprising polyvinylbutyral.
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) | 1985-10-11 | 1986-04-12 | 1986-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-11 | 1990-04-12 | 1990-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-11 | 1994-04-12 | 1994-10-12 | $7700.00 | Window Closed / Lapsed |