US2506877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of proteolytic proenzymes
Assignee: Armour and Co
•
Filing: 1945-10-06
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Granted: 1950-05-09
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Expires: 1965-10-06
Abstract
No abstract record available.
Inventors
- 👤 Havard L Keil
- 👤 Richard E Burgess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:18
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/94; Y; Y10; Y10S; Y10S435/00; Y10S435/814
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A METHOD OF RECOVERING PROTEOLYTIC PRO-ENZYMES FROM PANCREAS, COMPRISING MIXING GROUND PANCREAS WITH WATER AND HYDROCHLORIC ACID TO BRING THE PH TO 1.9-2.6, FILTERING TO REMOVE COARSE TISSUE, ADJUSTING THE PH TO ABOUT 4.5-6, ADDING SODIUM CHLORIDE SUBSTANTIALLY TO SATURATION WHILE MAINTAINING A TEMPERATURE BELOW 50*F. IN SAID MIXING, FILTERING, PH CHANGING, AND SALTING STEPS, AND FILTERING TO RECOVER THE PASTE PRODUCT CONTAINING PANCREATIC PROTEOLYTIC PRO-ENZYMES.
Claim 2
Independent Claim
66 words
A METHOD OF RECOVERING PROTEOLYTIC PRO-ENZYMES FROM PANCREAS, COMPRISING MIXING GROUND PANCREAS WITH WATER AND HYDROCHLORIC ACID TO BRING THE PH TO 1.9-2.6, FILTERING TO REMOVE COARSE TISSUE, ADJUSTING THE PH TO ABOUT 4.5-6, ADDING SODIUM CHLORIDE SUBSTANTIALLY TO SATURATION WHILE MAINTAINING A TEMPERATURE BELOW 50*F. IN SAID MIXING, FILTERING, PH CHANGING, AND SALTING STEPS, AND FILTERING TO RECOVER THE PASTE PRODUCT CONTAINING PANCREATIC PROTEOLYTIC PRO-ENZYMES.
References Cited (Backward Citations)
GB189420263A
Cited
US2313875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |