US3184394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of enzymes, toxins and toxoids
Assignee: Siemens Healthcare Diagnostics GmbH Germany
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Filing: 1962-06-04
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Granted: 1965-05-18
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Expires: 1982-06-04
Abstract
No abstract record available.
Inventors
- 👤 Schmidtberger Rudolf
- 👤 Schwick Hans-Gerhard
- 👤 Polnitz Wolfgang Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:21
CPC Classifications
A; A61; A61K; A61K39/00; A61K39/02; A61K39/08; A61K39/05; A61K47/00; A61K47/50; A61K47/51; A61K47/56; A61K47/58; A61K47/585; C; C07; C07K; C07K14/00; C07K14/195; C07K14/315; C07K14/3153; C12; C12N; C12N9/00; C12N9/14; C12N9/24; C12N9/2402; C12Y; C12Y302/00; C12Y302/01; C12Y302/01018; Y; Y10; Y10S; Y10S435/00; Y10S435/814; Y10S435/815
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PROCESS FOR THE PREPARATION OF ENZYMES OF BACTERIAL ORIGIN, WHICH COMPRISES DESALTING THE CRUDE SOLUTIONS CONTAINING THESE ACTIVE SUBSTANCES UNTIL AN ELECTRIC CONDUCTIVITY OF AT MOST 3.8 MS./CM. IS OBTAINED, ADJUSTING THE SOLUTIONS TO A PH VALUE OF 6 TO 11, ADSORBING THE ACTIVE SUBSTANCES ON DIETYHYL-AMINO-ETHYL-CELLULOSE AND ELUTING THE ACTIVE SUBSTANCES AT A PH VALUE OF 2 TO 7 BY MEANS OF A 0.1 TO 0.5 MOLAR SALT SOLUTION OF THE GROUP CONSISTING OF A PHOSPHATE BUFFER SOLUTION, AN ACETATE BUFFER SOLUTION AND A SODIUM CHLORIDE SOLUTION.
Claim 2
Dependent Claim
89 words
A PROCESS FOR THE PREPARATION OF ENZYMES OF BACTERIAL ORIGIN, WHICH COMPRISES DESALTING THE CRUDE SOLUTIONS CONTAINING THESE ACTIVE SUBSTANCES UNTIL AN ELECTRIC CONDUCTIVITY OF AT MOST 3.8 MS./CM. IS OBTAINED, ADJUSTING THE SOLUTIONS TO A PH VALUE OF 6 TO 11, ADSORBING THE ACTIVE SUBSTANCES ON DIETYHYL-AMINO-ETHYL-CELLULOSE AND ELUTING THE ACTIVE SUBSTANCES AT A PH VALUE OF 2 TO 7 BY MEANS OF A 0.1 TO 0.5 MOLAR SALT SOLUTION OF THE GROUP CONSISTING OF A PHOSPHATE BUFFER SOLUTION, AN ACETATE BUFFER SOLUTION AND A SODIUM CHLORIDE SOLUTION.
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) | 1968-05-17 | 1968-11-16 | 1969-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-17 | 1972-11-16 | 1973-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-17 | 1976-11-16 | 1977-05-18 | $7700.00 | Window Closed / Lapsed |