Patent US3235337A successfully refreshed from Google Patents.
US3235337A
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US
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Diagnostic compositions and test indicators
Assignee: Bayer Corp
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Filing: 1962-10-22
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Granted: 1966-02-15
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Expires: 1982-10-22
Abstract
No abstract record available.
Inventors
- 👤 Robert D Artis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:22
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; C; C12; C12Q; C12Q1/00; C12Q1/26; C12Q1/28; Y; Y10; Y10S; Y10S435/00; Y10S435/805; Y10S436/00; Y10S436/904
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
91 words
A TEST DEVICE FOR DETECTING L-AMINO ACIDS IN FLUIDS CONTAINING ANIONS WHICH INHIBIT L-AMINO ACID OXIDASE ACTIVITY WHICH COMPRISES A BIBULOUS MATERIAL CONTAINING THEREIN A FIRST ZONE IMPREGNATED WITH A DIVALENT METAL CHLORIDE SELECTED FROM THE GROUP CONSISTING OF BARIUM CHLORIDE, MAGNESIUM CHLORIDE, CALCIUM CHLORIDE, CADMIUM CHLORIDE, STRONTIUM CHLORIDE AND LEAD CHLORIDE; AND IMMEDIATELY ADJACENT THERETO, A SECOND ZONE IMPREGNATED WITH A COMPOSITION COMPRISING L-AMINO ACID OXIDASE, A SUBSTANCE HAVING PEROXIDATIVE ACTIVITY, AND A COLOR INDICATOR WHICH IS RESPONSIVE IN THE PRESENCE OF HYDROGEN PEROXIDE AND THE MATERIAL HAVING PEROXIDATIVE ACTIVITY.
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |