US4517301A
Expired / Lapsed
US
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Ketone control test composition, method and test device
Assignee: Bayer Corp
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Filing: 1982-12-06
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Granted: 1985-05-14
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Expires: 2002-12-06
Abstract
Abstract A composition, device and method for preparing a ketone control solution are disclosed. The composition comprises dimethylformamide and a Group I, II or III metal salt of a beta -keto acid ester. The salt has the structure <IMAGE> in which R is lower alkyl of 1 to 6 carbon atoms, R' is an aliphatic or cyclic group having 1 to about 7 carbon atoms, M is a Group I, II or III metal ion and n is 1, 2 or 3. A carrier matrix incorporated with the composition can be affixed to a support member to form the device. Preferably, a hydrolyzing agent is included on the device in the same or another carrier matrix. The method for preparing the control solution comprises contacting a predetermined volume of an aqueous solution with the device for a predetermined time.
Inventors
- 👤 Carmine M. Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:06
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/64; Y; Y10; Y10T; Y10T436/00; Y10T436/10; Y10T436/104998; Y10T436/20; Y10T436/200833
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
82 words
A stable composition useful for preparing a ketone control solution, said composition comprising dimethylformamide and a predetermined quantity of a β-keto ester salt capable of being hydrolyzed in aqueous solution to a β-keto acid and having the formula ##STR5## in which R is lower alkyl of 1 to 6 carbon atoms, R' is an aliphatic group having 1 to 7 carbon atoms or cyclic group, M is a Group I, II or III metal ion and n is 1, 2 or 3.
Claim 2
Dependent Claim
82 words
A stable composition useful for preparing a ketone control solution, said composition comprising dimethylformamide and a predetermined quantity of a β-keto ester salt capable of being hydrolyzed in aqueous solution to a β-keto acid and having the formula ##STR5## in which R is lower alkyl of 1 to 6 carbon atoms, R' is an aliphatic group having 1 to 7 carbon atoms or cyclic group, M is a Group I, II or III metal ion and n is 1, 2 or 3.
Claim 3
Dependent Claim
17 words
The composition of claim 1 wherein R' is an aliphatic group having 1 to 7 carbon atoms.
Claim 4
Dependent Claim
9 words
The composition of claim 1 wherein R' is methyl.
Claim 5
Dependent Claim
13 words
The composition of claim 1 wherein the β-keto ester salt is sodium methylacetoacetate.
Claim 6
Dependent Claim
13 words
The composition of claim 1 wherein the β-keto ester salt is sodium ethylacetoacetate.
Claim 7
Dependent Claim
14 words
The composition of claim 1 wherein the β-keto ester salt is calcium methyl acetoacetate.
Claim 8
Independent Claim
39 words
A device useful in the preparation of a ketone control solution, said device comprising a carrier matrix incorporated with the composition of any one of claims 1 through 6; and a support member having said carrier matrix affixed thereto.
Claim 9
Independent Claim
43 words
A device useful in the preparation of a ketone control solution, said device comprising a carrier matrix incorporated with the composition of any one of claims 1 through 6 and a hydrolyzing agent; and a support member having said carrier matrix affixed thereto.
Claim 10
Independent Claim
50 words
A device useful in the preparation of a ketone control solution, said device comprising a carrier matrix incorporated with the composition of any one of claims 1 through 6; a second carrier matrix incorporated with a hydrolyzing agent; and a support member having each of said carrier matrices affixed thereto.
Claim 11
Dependent Claim
12 words
The device of claim 8 wherein the hydrolyzing agent is a base.
Claim 12
Dependent Claim
12 words
The device of claim 9 wherein the hydrolyzing agent is a base.
Claim 13
Dependent Claim
27 words
The device of claim 10 wherein the hydrolyzing agent is selected from the group consisting of sodium carbonate, potassium carbonate, sodium hydroxide, potassium hydroxide and mixtures thereof.
Claim 14
Dependent Claim
12 words
The device of claim 10 wherein the hydrolyzing agent is sodium carbonate.
Claim 15
Dependent Claim
27 words
The device of claim 11 wherein the hydrolyzing agent is selected from the group consisting of sodium carbonate, potassium carbonate, sodium hydroxide potassium hydroxide and mixtures thereof.
Claim 16
Dependent Claim
12 words
The device of claim 11 wherein the hydrolyzing agent is sodium carbonate.
Claim 17
Dependent Claim
39 words
A method for preparing a ketone control solution, which method comprises contacting a predetermined volume of an aqueous solution with the device of claim 7 for a predetermined time, and thereafter removing said device from contact with the solution.
Claim 18
Dependent Claim
39 words
A method for preparing a ketone control solution, which method comprises contacting a predetermined volume of an aqueous solution with the device of claim 8 for a predetermined time, and thereafter removing said device from contact with the solution.
Claim 19
Dependent Claim
39 words
A method for preparing a ketone control solution, which method comprises contacting a predetermined volume of an aqueous solution with the device of claim 9 for a predetermined time, and thereafter removing said device from contact with the solution.
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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) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |