Patent US3215657A successfully refreshed from Google Patents.
Patent US3920580A successfully refreshed from Google Patents.
US3920580A
Expired / Lapsed
US
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Liquid control solution
Assignee: Bayer Corp
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Filing: 1973-07-12
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Granted: 1975-11-18
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Expires: 1993-07-12
Abstract
Abstract A stable liquid control solution useful with dry reagent strips which strips are for determining whether or not glucose is present in blood or serum. The control solution comprising water, an antidiffusing agent and glucose. The antidiffusing agent may be selected from materials such as polyvinylpyrrolidone, polyvinyl alcohol, polyethylene glycol, dextran and bovine serum albumin. The control solution may also include adjuvants such as preservatives, common salts, dyes, colored latex particles, etc.
Inventors
- 👤 Raymond L Mast
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:07
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/54; Y; Y10; Y10S; Y10S435/00; Y10S435/803; Y10T; Y10T436/00; Y10T436/10; Y10T436/104998; Y10T436/105831; Y10T436/108331
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
A STABLE LIQUID CONTROL SOLUTION INCLUDING A PREDETERMINED AMOUNT OF GLUCOSE FOR USE IN DETERMINING THE VALIDITY OF A DRY REAGENT STRIP CAPABLE OF INDICATING AMOUNTS OF GLUCOSE IN BLOOD OR BLOOD SERUM WHICH SOLUTION EMULATES WHOLE BODY OR BLOOD SERUM USED WITH SAID STRIP, THE SOLUTION COMPRISING WATER, GLUCOSE, A PRESERVATIVE AND BETWEEN ABOUT 3 AND 35 PERCENT BY WEIGHT OF AN ANTIDIFFUSING AGENT SELECTED FROM THE GROUP CONSISTING OF POLYVINYLPYRROLIDONE, POLYVINYL ALCOHOL, POLYETHYLENE GLYCOL DEXTRAN AND BOVINE SERUM ALBUMIN.
Claim 2
Dependent Claim
81 words
A STABLE LIQUID CONTROL SOLUTION INCLUDING A PREDETERMINED AMOUNT OF GLUCOSE FOR USE IN DETERMINING THE VALIDITY OF A DRY REAGENT STRIP CAPABLE OF INDICATING AMOUNTS OF GLUCOSE IN BLOOD OR BLOOD SERUM WHICH SOLUTION EMULATES WHOLE BODY OR BLOOD SERUM USED WITH SAID STRIP, THE SOLUTION COMPRISING WATER, GLUCOSE, A PRESERVATIVE AND BETWEEN ABOUT 3 AND 35 PERCENT BY WEIGHT OF AN ANTIDIFFUSING AGENT SELECTED FROM THE GROUP CONSISTING OF POLYVINYLPYRROLIDONE, POLYVINYL ALCOHOL, POLYETHYLENE GLYCOL DEXTRAN AND BOVINE SERUM ALBUMIN.
Claim 3
Dependent Claim
12 words
The solution of claim 1 in which said antidiffusing agent is polyvinylpyrrolidone.
Claim 4
Dependent Claim
13 words
The solution of claim 1 in which said antidiffusing agent is polyethylene glycol.
Claim 5
Dependent Claim
12 words
The solution of claim 1 in which said antidiffusing agent is dextran.
Claim 6
Dependent Claim
22 words
The solution of claim 1 in which said preservative is present in an amount between about 0.01 and 0.3 percent by weight.
Claim 7
Dependent Claim
11 words
The solution of claim 1 which additionally includes a common salt.
Claim 8
Dependent Claim
14 words
The solution according to claim 6 in which said common salt is sodium chloride.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |