Patent US2769747A successfully refreshed from Google Patents.
US2769747A
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Process of separation of siliceous impurities from insulin solutions
Assignee: Armour and Co
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Filing: 1953-02-18
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Granted: 1956-11-06
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Expires: 1973-02-18
Abstract
No abstract record available.
Inventors
- 👤 Lorne G Sampson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:18
CPC Classifications
C; C07; C07K; C07K14/00; C07K14/435; C07K14/575; C07K14/62; C07K14/625; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/843; Y10S530/845
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN A PROCESS FOR RECOVERING INSULIN FROM PANCREASE GLANDS WHEREIN THE EXTRACTED INSULIN IS ADSORBED ON A CLAY ADSORBENT, THE STEPS OF ELUTING THE ADSORBED INSULIN BY CONTACTING THE ADSORBENT WITH AN AQUEOUS ELUANT AT A PH OF FROM 9.5 TO 13, THEREBY OBTAINING AN AQUEOUS SOLUTION OF INSULIN CONTAINING DISSOLVED SILICEOUS IMPURITIES, ADJUSTING THE PH OF SAID SOLUTION TO A PH WITHIN THE RANGE FROM 6.5 TO 9.0, MAINTAINING SAID SOLUTION AT SAID ADJUSTED PH UNTIL SAID SILICEOUS IMPURITIES HAVE BEEN FORMED INTO A FLOCCULENT PRECIPITATE, AND SEPARATING SAID PRECIPITATE FROM SAID SOLUTION.
Claim 2
Dependent Claim
94 words
IN A PROCESS FOR RECOVERING INSULIN FROM PANCREASE GLANDS WHEREIN THE EXTRACTED INSULIN IS ADSORBED ON A CLAY ADSORBENT, THE STEPS OF ELUTING THE ADSORBED INSULIN BY CONTACTING THE ADSORBENT WITH AN AQUEOUS ELUANT AT A PH OF FROM 9.5 TO 13, THEREBY OBTAINING AN AQUEOUS SOLUTION OF INSULIN CONTAINING DISSOLVED SILICEOUS IMPURITIES, ADJUSTING THE PH OF SAID SOLUTION TO A PH WITHIN THE RANGE FROM 6.5 TO 9.0, MAINTAINING SAID SOLUTION AT SAID ADJUSTED PH UNTIL SAID SILICEOUS IMPURITIES HAVE BEEN FORMED INTO A FLOCCULENT PRECIPITATE, AND SEPARATING SAID PRECIPITATE FROM SAID SOLUTION.
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) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |