US3419471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of albumin-free lysozyme
Assignee: Eisai Co Ltd
•
Filing: 1966-03-14
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Granted: 1968-12-31
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Expires: 1986-03-14
Abstract
No abstract record available.
Inventors
- 👤 Matsuoka Yoshitaka
- 👤 Hidaka Yoshio
- 👤 Yoshizawa Masayuki
- 👤 Hashimoto Akira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:12
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/14; C12N9/24; C12N9/2402; C12N9/2462; B; B01; B01J; B01J47/00; B01J47/014; Y; Y10; Y10S; Y10S435/00; Y10S435/814; Y10S435/815
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
PROCESS FOR PREPARING ALBUMIN-FREE LYSOZYME, WHICH COMPRISES DESALTING AN AQUEOUS SOLUTION OF CRUDE LYSOZYME OR ITS SALTS CONTAINING ALBUMINS AND INORGANIC SALTS AS IMPURITIES, ADJUSTING THE PH OF THE DESALTED SOLUTION TO 6.0-10.5 AND THE IONIC STRENGTH OF THE DESALTED SOLUTION TO NOT MORE THAN 0.5 BY THE ADDITION OF BUFFER SOLUTION AND FILTERING SAID SOLUTION BY USING A MATERIAL SELECTED FROM THE GROUP COMPRISING OF ANION EXCHANGE CELLULOES AND ANION EXCHANGE DEXTRANS AS A FILTERING MATERIAL, ABSORBING SAID ALBUMINS ON SAID FILTERING MATERIAL AND OBTAINING ALBUMINFREE LYSOZYME AS FILTRATE.
Claim 2
Dependent Claim
90 words
PROCESS FOR PREPARING ALBUMIN-FREE LYSOZYME, WHICH COMPRISES DESALTING AN AQUEOUS SOLUTION OF CRUDE LYSOZYME OR ITS SALTS CONTAINING ALBUMINS AND INORGANIC SALTS AS IMPURITIES, ADJUSTING THE PH OF THE DESALTED SOLUTION TO 6.0-10.5 AND THE IONIC STRENGTH OF THE DESALTED SOLUTION TO NOT MORE THAN 0.5 BY THE ADDITION OF BUFFER SOLUTION AND FILTERING SAID SOLUTION BY USING A MATERIAL SELECTED FROM THE GROUP COMPRISING OF ANION EXCHANGE CELLULOES AND ANION EXCHANGE DEXTRANS AS A FILTERING MATERIAL, ABSORBING SAID ALBUMINS ON SAID FILTERING MATERIAL AND OBTAINING ALBUMINFREE LYSOZYME AS FILTRATE.
References Cited (Backward Citations)
US2579455A
Cited
US3184394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |