US3720657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for extracting pancreas glands
Assignee: Organon NV
•
Filing: 1969-11-06
•
Granted: 1973-03-13
•
Expires: 1989-11-06
Abstract
Abstract THE INVENTION RELATES TO A PROCESS FOR EXTRACTING INSULIN FROM PANCREAS GLANDS BY MEANS OF AN ACIDIFIED SOLVENT FOR INSULIN AND COMPRISES EXTRACTING THE PANCREAS WITH A SOLVENT ACIDIFIED WITH SULPHURIC ACID, PREFERABLY AT A PH BETWEEN ABOUT 2.4 AND 5.2, AFTER WHICH HYDROCHLORIC ACID IS ADDED TO THE EXTRACTION MIXTURE PREFERABLY TILL THE PH IS ABOUT 2.0 AND THE EXTRACTION IS CONTINUED. IN THIS WAY THE AMOUNT OF PROTEIN OBTAINED IS ON A HIGH LEVEL, WHEREAS THE EXTRACT CAN BE EASILY SEPARATED FROM THE TISSUE RESIDUE TO GIVE A CLEAR EXTRACT AND THE PRECIPITATE OF INACTIVE PROTEINS, FORMED BY ADJUSTING THE PH OF THE EXTRACT TO ABOUT 8, CAN BE FILTERED IN A VERY SHORT TIME.
Inventors
- 👤 Vries J De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:51
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: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |