US2856366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable alkaline metal solutions containing carboxymethyl dextran
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1956-07-30
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Granted: 1958-10-14
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Expires: 1976-07-30
Abstract
No abstract record available.
Inventors
- 👤 Leo J Novak
- 👤 Jack J Bulloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:49
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/0004; B01J13/0034; G; G01; G01N; G01N31/00; G01N31/02; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A STABLE AQUEOUS ALKALINE SOLUTION OF A WATERSOLUBLE SALT OF A METAL WHICH, IN ALKALINE SOLUTION, YIELDS METALLIC IONS THAT NORMALLY READILY FORM A HYDROUS OXIDE WHICH PRECIPITATES FROM THE ALKALINE SOLUTION, SAID SOLUTION HAVING A HYDROXYL ION CONCENTRATION BETWEEN 0.14 N AND 5.8 N AND CONTAINING A SUBSTANCE WHICH PREVENTS PRECIPITATION OF THE HYDROUS OXIDE AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF CARBOXYMETHYL ETHERS OF DEXTRAN HAVING A MOLECULAR WEIGHT BETWEEN 2000 AND THAT OF NATIVE, UNHYDROLYZED, MICROBIOLOGICALLY PRODUCED DEXTRAN, SAID ETHERS CONTAINING AN AVERAGE OF FROM 1.0 TO 3.0 CARBOXYMETHYL GROUPS PER ANHYDROGLUCOSE UNIT OF THE DEXTRAN, AND ALKALI METAL SALTS OF SAID ETHERS, THE AMOUNT OF THE DEXTRAN DERIVATIVE PRESENT IN THE SOLUTION BEING SUCH THAT THE CARBOXYMETHYL ANION-METALLIC CATION EQUIVALENTS RATIO IN THE SOLUTION IS FROM 0.5 TO 5.0
Claim 2
Dependent Claim
135 words
A STABLE AQUEOUS ALKALINE SOLUTION OF A WATERSOLUBLE SALT OF A METAL WHICH, IN ALKALINE SOLUTION, YIELDS METALLIC IONS THAT NORMALLY READILY FORM A HYDROUS OXIDE WHICH PRECIPITATES FROM THE ALKALINE SOLUTION, SAID SOLUTION HAVING A HYDROXYL ION CONCENTRATION BETWEEN 0.14 N AND 5.8 N AND CONTAINING A SUBSTANCE WHICH PREVENTS PRECIPITATION OF THE HYDROUS OXIDE AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF CARBOXYMETHYL ETHERS OF DEXTRAN HAVING A MOLECULAR WEIGHT BETWEEN 2000 AND THAT OF NATIVE, UNHYDROLYZED, MICROBIOLOGICALLY PRODUCED DEXTRAN, SAID ETHERS CONTAINING AN AVERAGE OF FROM 1.0 TO 3.0 CARBOXYMETHYL GROUPS PER ANHYDROGLUCOSE UNIT OF THE DEXTRAN, AND ALKALI METAL SALTS OF SAID ETHERS, THE AMOUNT OF THE DEXTRAN DERIVATIVE PRESENT IN THE SOLUTION BEING SUCH THAT THE CARBOXYMETHYL ANION-METALLIC CATION EQUIVALENTS RATIO IN THE SOLUTION IS FROM 0.5 TO 5.0
References Cited (Backward Citations)
US694658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |