US3212855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diagnostic device
Assignee: Bayer Corp
•
Filing: 1962-08-06
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Granted: 1965-10-19
•
Expires: 1982-08-06
Abstract
No abstract record available.
Inventors
- 👤 Mast Ray
- 👤 Jr John Rebar
- 👤 Fraser Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:59
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/87; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/64; G01S15/02; G01S15/06; G01S15/08; G01S15/10; G01S15/101; G01S7/00; G01S7/52; G01S7/56; Y; Y10; Y10T; Y10T436/00; Y10T436/20; Y10T436/200833
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A PROCESS FOR THE PREPARATION OF A TEST DEVICE FOR THE DETECTION OF KETONE BODIES IN BODY FLUIDS WHICH COM PRISES: (A) IMPREGNATING A BIBULOUS CARRIER WITH AN AQUEOUS SOLUTION OF A BUFFER PROVIDING A PH RANGE OF FROM ABOUT 8 TO ABOUT 10 AND A WATER SOLUBLE AMINO ACID, (B) DRYING THE IMPREGNATED BIBULOUS CARRIER; (C) FURTHER IMPREGNATING THE BIBULOUS CARRIER IN THE AREA PREVIOUSLY IMPREGNATED WITH THE BUFFER AND AMINO ACID WITH A SOLUTION, IN AN ORGANIC SOLVENT, OF (1) AN ALKALI METAL NITROPRUSSIDE, AND (2) A POLYMERIC SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF POLYVINYLPYRROLIDONE-VINYL ACETATE COPOLYMERS, METHYL VINYL ETHER-MALEIC ANHYDRIDE COPOLYMERS, POLYETHYLENE GLYCOL, POLYVINYL ACETATE, METHYL VINYL ETHER-MALEIC ANHYDRIDE INTERPOLYMERS, VINYL PYRROLIDONE-STYRENE COPOLYMERS AND WATER SOLUBLE ACRYLIC COPOLYMERS; AND (D) REMOVING THE SOLVENT FROM THE FURTHER IMPREGNATED BIBULOUS CARRIER.
Claim 2
Dependent Claim
133 words
A PROCESS FOR THE PREPARATION OF A TEST DEVICE FOR THE DETECTION OF KETONE BODIES IN BODY FLUIDS WHICH COM PRISES: (A) IMPREGNATING A BIBULOUS CARRIER WITH AN AQUEOUS SOLUTION OF A BUFFER PROVIDING A PH RANGE OF FROM ABOUT 8 TO ABOUT 10 AND A WATER SOLUBLE AMINO ACID, (B) DRYING THE IMPREGNATED BIBULOUS CARRIER; (C) FURTHER IMPREGNATING THE BIBULOUS CARRIER IN THE AREA PREVIOUSLY IMPREGNATED WITH THE BUFFER AND AMINO ACID WITH A SOLUTION, IN AN ORGANIC SOLVENT, OF (1) AN ALKALI METAL NITROPRUSSIDE, AND (2) A POLYMERIC SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF POLYVINYLPYRROLIDONE-VINYL ACETATE COPOLYMERS, METHYL VINYL ETHER-MALEIC ANHYDRIDE COPOLYMERS, POLYETHYLENE GLYCOL, POLYVINYL ACETATE, METHYL VINYL ETHER-MALEIC ANHYDRIDE INTERPOLYMERS, VINYL PYRROLIDONE-STYRENE COPOLYMERS AND WATER SOLUBLE ACRYLIC COPOLYMERS; AND (D) REMOVING THE SOLVENT FROM THE FURTHER IMPREGNATED BIBULOUS CARRIER.
References Cited (Backward Citations)
US2229155A
Cited
US2186902A
Cited
US2509140A
Cited
US2577978A
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GB867192A
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US2990253A
Cited
US3092465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |