US3616235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for precipitating enzymes and enzymatic inactive proteins in solution with synthetic tanning materials
Assignee: FORSCH DIE GARUNGSINDUSTRIE EN
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Filing: 1968-05-16
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Granted: 1971-10-26
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Expires: 1988-05-16
Abstract
Abstract A process for making dry preparations of enzymes or proteins with low-salt content is characterized by precipitating albumencontaining culture solutions or culture filtrates with anionic, cationic or amphoteric-tanning materials and in that the following extraction of inorganic salts and tanning materials takes place with water or mixtures of water and organic solvents, particularly with mono- and/or polyvalent alcohols and ketones, glycol ethers, dioxanes and tetrahydrofurans mixable with water.
Inventors
- 👤 Dietmar Schoepfel
- 👤 Johann Huber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:14
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/14; C12N9/24; C12N9/2402; C12N9/2405; C12N9/2408; C12N9/2411; C12N9/2414; C12N9/2417; Y; Y10; Y10S; Y10S435/00; Y10S435/814; Y10S435/816; Y10S530/00; Y10S530/82; Y10S530/825
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
29 words
The process in accordance with claim 1, wherein the organic solvents are selected from at least a monovalent alcohol and ketones, glycol ethers, dioxanes and tetrahydrofurans mixable with water.
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |