Patent US2753291A successfully refreshed from Google Patents.
US2753291A
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Method for purifying streptodornase-atreptokinase
Assignee: Wyeth Holdings LLC
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Filing: 1954-04-05
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Granted: 1956-07-03
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Expires: 1974-04-05
Abstract
No abstract record available.
Inventors
- 👤 John H Mowat
- 👤 George C Krupka
- 👤 Nalesnyk Stephen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:37
CPC Classifications
C; C07; C07K; C07K14/00; C07K14/195; C07K14/315; C07K14/3153; Y; Y10; Y10S; Y10S435/00; Y10S435/814; Y10S435/815
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A METHOD FOR RECOVERING STREPTODORNASE FROM SUBSTANTIALLY PURE AQUEOUS SOLUTIONS CONTAINING THE SAME, WHICH COMPRISES ADJUSTING CELL-FREE, STREPTODORNASE-CON TAINING AQUEOUS SOLUTIONS TO A PH OF ABOUT 0.5 TO ABOUT 2.5, ADMIXING A QUANTITY OF ADSORBENT MATERIAL THEREWITH ADJUSTING THE PH OF SAID SOLUTION OF NOT LESS THAN 6.0 AND NOT MORE THAN 9.0 SO AS TO ABSORB THE STREPTODORNASE THEREON, RECOVERING THE ADSORBENT FROM THE SOLUTION, TREATING SAID ADSORBENT WITH SUFFICIENT ALKALI-CONTAINING WATER TO BRING THE MIXTURE TO A PH OF ABOUT 9.0 TO 11.5, FILTERING SAID MIXTURE AND RECOVERING STREPTODORNASE FROM THE FILTRATE.
Claim 2
Independent Claim
94 words
A METHOD FOR RECOVERING STREPTODORNASE FROM SUBSTANTIALLY PURE AQUEOUS SOLUTIONS CONTAINING THE SAME, WHICH COMPRISES ADJUSTING CELL-FREE, STREPTODORNASE-CON TAINING AQUEOUS SOLUTIONS TO A PH OF ABOUT 0.5 TO ABOUT 2.5, ADMIXING A QUANTITY OF ADSORBENT MATERIAL THEREWITH ADJUSTING THE PH OF SAID SOLUTION OF NOT LESS THAN 6.0 AND NOT MORE THAN 9.0 SO AS TO ABSORB THE STREPTODORNASE THEREON, RECOVERING THE ADSORBENT FROM THE SOLUTION, TREATING SAID ADSORBENT WITH SUFFICIENT ALKALI-CONTAINING WATER TO BRING THE MIXTURE TO A PH OF ABOUT 9.0 TO 11.5, FILTERING SAID MIXTURE AND RECOVERING STREPTODORNASE FROM THE FILTRATE.
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) | 1959-07-03 | 1960-01-02 | 1960-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-03 | 1964-01-02 | 1964-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-03 | 1968-01-02 | 1968-07-03 | $7700.00 | Window Closed / Lapsed |