US3100736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of highly purified callicrein preparations
Assignee: Bayer AG
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Filing: 1961-03-16
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Granted: 1963-08-13
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Expires: 1981-03-16
Abstract
No abstract record available.
Inventors
- 👤 Werle Eugen
- 👤 Trautschold Ivar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:35
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/14; C12N9/48; C12N9/50; C12N9/64; C12N9/6421; C12N9/6424; C12N9/6445
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
METHOD FOR THE PRODUCTION OF HIGHLY PURIFIED CALLICREIN PREPARATIONS CHARACTERIZED BY ADSORBING CALLICREIN FROM ITS SOLUTIONS ON A BASICALLY SUBSTAITUED CELLULOSE SELECTED FROM THE GROUP CONSISTING OF DIETHYL AMINOETHYL CELLULOSE, TRIETHYL AMINOETHYL CELLULOSE, AND P-AMINOBENZYL CELLULOSE, WASHING THE ADSORBATE WITH A HIGHLY DILUTE BUFFERED ELECTROLYTE SOLUTION WHEREIN SAID ELECTROLYTE IS SELECTED FROM THE GROUP CONSISTING OF SODIUM CHLORIDE, POTASSIUM CHLORIDE AND AMMONIUM CHLORIDE UNTIL A NEARLY PROTEIN-FREE FILTRATE IS OBTAINED EXTRACTING THE ACTIVE SUBSTANCE FROM THE ADSORBATE WITH A BUFFERED SOLUTION CONTAINING AT LEAST 1% OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF SODIUM CHLORIDE, POTASSIUM CHLORIDE AND AMMONIUM CHLORIDE ELECTROLYTE.
Claim 2
Dependent Claim
102 words
METHOD FOR THE PRODUCTION OF HIGHLY PURIFIED CALLICREIN PREPARATIONS CHARACTERIZED BY ADSORBING CALLICREIN FROM ITS SOLUTIONS ON A BASICALLY SUBSTAITUED CELLULOSE SELECTED FROM THE GROUP CONSISTING OF DIETHYL AMINOETHYL CELLULOSE, TRIETHYL AMINOETHYL CELLULOSE, AND P-AMINOBENZYL CELLULOSE, WASHING THE ADSORBATE WITH A HIGHLY DILUTE BUFFERED ELECTROLYTE SOLUTION WHEREIN SAID ELECTROLYTE IS SELECTED FROM THE GROUP CONSISTING OF SODIUM CHLORIDE, POTASSIUM CHLORIDE AND AMMONIUM CHLORIDE UNTIL A NEARLY PROTEIN-FREE FILTRATE IS OBTAINED EXTRACTING THE ACTIVE SUBSTANCE FROM THE ADSORBATE WITH A BUFFERED SOLUTION CONTAINING AT LEAST 1% OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF SODIUM CHLORIDE, POTASSIUM CHLORIDE AND AMMONIUM CHLORIDE ELECTROLYTE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |