Patent US2923665A successfully refreshed from Google Patents.
US2923665A
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Processes for preparing human plasminogen from human placenta sources
Assignee: Wyeth Holdings LLC
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Filing: 1956-11-07
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Granted: 1960-02-02
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Expires: 1976-11-07
Abstract
No abstract record available.
Inventors
- 👤 Hagan James Joyce
- 👤 Clarke Ralph Edward
- 👤 Frank B Ablondi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:00
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/14; C12N9/48; C12N9/50; C12N9/64; C12N9/6421; C12N9/6424; C12N9/6435; C12Y; C12Y304/00; C12Y304/21; C12Y304/21007; Y; Y10; Y10S; Y10S435/00; Y10S435/814; Y10S435/815; Y10S530/00; Y10S530/827; Y10S530/829; Y10S530/83; Y10S530/831; Y10S530/85; Y10S530/851
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
THE PROCESS OF PURIFYING AND RECOVERING PLASMINOGEN FROM HUMAN PLACENTAL SOURCES WHICH COMPRISES SUSPENDING A MATERIAL FROM THE GROUP CONSISTING OF FRACTION III2 AND THE EUGLOBULIN FRACTION IN ALKALINE WATER AT A PH OF BETWEEN ABOUT 8 AND 11.5, ACIDIFYING THE SUSPENSION TO A PH OF BETWEEN 1 AND 4, ADJUSTING THE IONIC CONCENTRATION OF THE SUSPENSION TO BETWEEN 0.15-0.70 SO AS TO FLOCCULATE THE IMPURITIES CONTAINED THEREIN, REMOVING THE FLOCCULATED IMPURITIES, AND THEREAFTER ADJUSTING THE PH OF THE SOLUTION TO BETWEEN ABOUT6-9.
Claim 2
Dependent Claim
83 words
THE PROCESS OF PURIFYING AND RECOVERING PLASMINOGEN FROM HUMAN PLACENTAL SOURCES WHICH COMPRISES SUSPENDING A MATERIAL FROM THE GROUP CONSISTING OF FRACTION III2 AND THE EUGLOBULIN FRACTION IN ALKALINE WATER AT A PH OF BETWEEN ABOUT 8 AND 11.5, ACIDIFYING THE SUSPENSION TO A PH OF BETWEEN 1 AND 4, ADJUSTING THE IONIC CONCENTRATION OF THE SUSPENSION TO BETWEEN 0.15-0.70 SO AS TO FLOCCULATE THE IMPURITIES CONTAINED THEREIN, REMOVING THE FLOCCULATED IMPURITIES, AND THEREAFTER ADJUSTING THE PH OF THE SOLUTION TO BETWEEN ABOUT6-9.
References Cited (Backward Citations)
US2385803A
Cited
US2390074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |