US2695861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of insulin
Assignee: Armour and Co
•
Filing: 1951-04-03
•
Granted: 1954-11-30
•
Expires: 1971-04-03
Abstract
No abstract record available.
Inventors
- 👤 Loyal C Maxwell
- 👤 William P Hinkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:36
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
103 words
IN A PROCESS FOR OBTAINING INSULIN FROM PANCREAS GLANDS, THE STEPS OF FORMING AN EXTRACTION MIXTURE OF INSULIN-BEARING PANCREAS GLANDULAR SOLIDS AND AN AQUEOUS ORGANIC SOLVENT FOR INSULIN, SAID MIXTURE BEING ACIDIFIED TO A PH FROM 2.5 TO 4.0 WITH PHOSPHORIS ACID AND SAID ORGANIC SOLVENT THEREIN BEING AT A CONCENTRATION FAVOURING THE SOLUBILIZATION OF INSULIN OVER PANCREATIC ENZYMES, EXTRACTING INSULIN FROM SAID GLANDULAR SOLIDS INTO SAID AQUEOUS ORGANIC SOLVENT TO FORM AN INSULIN EXTRACT, ADDING AMMONIA TO THE EXTRACT TO ADJUST THE PH THEREOF FROM 5.5 TO 8.5 FOR PRECIPITATING AMMONIUM SALTS OF PHOSPHORIC ACID, AND SEPARATING THE PHOSPHORIC SALTS THUS PRECIPITATED.
Claim 2
Dependent Claim
103 words
IN A PROCESS FOR OBTAINING INSULIN FROM PANCREAS GLANDS, THE STEPS OF FORMING AN EXTRACTION MIXTURE OF INSULIN-BEARING PANCREAS GLANDULAR SOLIDS AND AN AQUEOUS ORGANIC SOLVENT FOR INSULIN, SAID MIXTURE BEING ACIDIFIED TO A PH FROM 2.5 TO 4.0 WITH PHOSPHORIS ACID AND SAID ORGANIC SOLVENT THEREIN BEING AT A CONCENTRATION FAVOURING THE SOLUBILIZATION OF INSULIN OVER PANCREATIC ENZYMES, EXTRACTING INSULIN FROM SAID GLANDULAR SOLIDS INTO SAID AQUEOUS ORGANIC SOLVENT TO FORM AN INSULIN EXTRACT, ADDING AMMONIA TO THE EXTRACT TO ADJUST THE PH THEREOF FROM 5.5 TO 8.5 FOR PRECIPITATING AMMONIUM SALTS OF PHOSPHORIC ACID, AND SEPARATING THE PHOSPHORIC SALTS THUS PRECIPITATED.
References Cited (Backward Citations)
US1669328A
Cited
US1866569A
Cited
US2353016A
Cited
US2529152A
Cited
US2571126A
Cited
US2466487A
Cited
US2595278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-29 | 1958-05-31 | 1958-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-29 | 1962-05-31 | 1962-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-29 | 1966-05-31 | 1966-11-30 | $7700.00 | Window Closed / Lapsed |