Patent US2537934A successfully refreshed from Google Patents.
US2537934A
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Antibiotic salts of mono (higher-aliphatic) sulfates, preparation of these salts, and purification of the antibiotics thereby
Assignee: ER Squibb and Sons LLC
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Filing: 1947-08-09
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Granted: 1951-01-09
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Expires: 1967-08-09
Abstract
No abstract record available.
Inventors
- 👤 William A Lott
- 👤 Bernstein Jack
- 👤 Leon J Heuser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:03
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/20; C07H15/22; C07H15/238
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
41 words
THE METHOD WHICH COMPRISES INTERACTING AN ANTIBIOTIC OF THE GROUP CONSISTING OF STREPTOMYCIN, DIHYDROSTREPTOMYCIN, AND STREPTOTHRICIN WITH A SURFACE-ACTIVE AGENT OF THE GROUP CONSISTING OF MONO (HIGHER-ALIPHATIC) ESTERS OF SULFURIC ACID AND WATER-SOLUBLE SALTS THEREOF, IN A SOLVENT FOR THE REACTANTS.
Claim 2
Independent Claim
41 words
THE METHOD WHICH COMPRISES INTERACTING AN ANTIBIOTIC OF THE GROUP CONSISTING OF STREPTOMYCIN, DIHYDROSTREPTOMYCIN, AND STREPTOTHRICIN WITH A SURFACE-ACTIVE AGENT OF THE GROUP CONSISTING OF MONO (HIGHER-ALIPHATIC) ESTERS OF SULFURIC ACID AND WATER-SOLUBLE SALTS THEREOF, IN A SOLVENT FOR THE REACTANTS.
Claim 3
Dependent Claim
23 words
A SALT-TYPE COMBINATION OF AN ANTIBIOTIC OF THE GROUP CONSISTING OF STREPTOMYCIN, DIHYDROSTREPTOMYCIN, AND STREPTOTHRICIN AND A MONO (HIGHER-ALIPHATIC) ESTER OF SULFURIC ACID.
Claim 4
Dependent Claim
23 words
A SALT-TYPE COMBINATION OF AN ANTIBIOTIC OF THE GROUP CONSISTING OF STREPTOMYCIN, DIHYDROSTREPTOMYCIN, AND STREPTOTHRICIN AND A MONO (HIGHER-ALIPHATIC) ESTER OF SULFURIC ACID.
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) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |