Patent US2997423A successfully refreshed from Google Patents.
US2997423A
Expired / Lapsed
US
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Method of making a composition of sodium carboxymethyl dextran and an antibiotic
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1959-04-20
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Granted: 1961-08-22
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Expires: 1979-04-20
Abstract
No abstract record available.
Inventors
- 👤 Leo J Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:08
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/70; A01; A01N; A01N25/00; A01N25/08; A01N25/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A METHOD OF MAKING A GERMICIDAL COMPOSITION COMPRISING SODIUM CARBOXYMETHYL DEXTRAN AND AN ANTIBIOTIC COMPRISING DISSOLVING 32.4 GRAMS OF NATIVE UNHYDROLYZED L.M. B-512 DEXTRAN IN 125 MLS. OF WATER TO FORM A SOLUTION OF THE SAME, ADMIXING IN SAID SOLUTION 163 GRAMS OF SODIUM CHLORACETATE DISSOLVED IN 125 MLS. OF WATER, THEREAFTER ADDING TO THE RESULTANT SOLUTION 64 GRAMS OF SODIUM HYDROXIDE AND COOLING THE REACTION MIXTURE TO ROOM TEMPERATURE, THEN ADMIXING THEREWITH 500 MLS. OF METHANOL IN WHICH IS DISSOLVED A SMALL BUT EFFECTIVE AMOUNT OF AN ANTIBIOTIC SELECTED FROM THE GROUP CONSISTING OF PENICILLIN AND STREPTOMYCIN, FILTERING THE RESULTANT MASS TO RECOVER A PRECIPITATE CONSISTING OF SODIUM CARBOXYMETHYL DEXTRAN AND SAID ANTIBIOTIC, AND DRYING SAID PRECIPITATE AND REDUCING THE SAME TO PROVIDE A GERMICIDAL POWDER.
Claim 2
Independent Claim
127 words
A METHOD OF MAKING A GERMICIDAL COMPOSITION COMPRISING SODIUM CARBOXYMETHYL DEXTRAN AND AN ANTIBIOTIC COMPRISING DISSOLVING 32.4 GRAMS OF NATIVE UNHYDROLYZED L.M. B-512 DEXTRAN IN 125 MLS. OF WATER TO FORM A SOLUTION OF THE SAME, ADMIXING IN SAID SOLUTION 163 GRAMS OF SODIUM CHLORACETATE DISSOLVED IN 125 MLS. OF WATER, THEREAFTER ADDING TO THE RESULTANT SOLUTION 64 GRAMS OF SODIUM HYDROXIDE AND COOLING THE REACTION MIXTURE TO ROOM TEMPERATURE, THEN ADMIXING THEREWITH 500 MLS. OF METHANOL IN WHICH IS DISSOLVED A SMALL BUT EFFECTIVE AMOUNT OF AN ANTIBIOTIC SELECTED FROM THE GROUP CONSISTING OF PENICILLIN AND STREPTOMYCIN, FILTERING THE RESULTANT MASS TO RECOVER A PRECIPITATE CONSISTING OF SODIUM CARBOXYMETHYL DEXTRAN AND SAID ANTIBIOTIC, AND DRYING SAID PRECIPITATE AND REDUCING THE SAME TO PROVIDE A GERMICIDAL POWDER.
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) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |