US2573099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recovering proteolytic enzymes from mammalian pancreas glands with urea
Assignee: Novo Terapeutisk Laboratorium AS
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Filing: 1951-01-03
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Granted: 1951-10-30
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Expires: 1971-01-03
Abstract
No abstract record available.
Inventors
- 👤 Frederiksen Svend Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:54
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/94; Y; Y10; Y10S; Y10S435/00; Y10S435/814; Y10S435/816; Y10S530/00; Y10S530/827; Y10S530/843; Y10S530/845
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A METHOD OF RECOVERING PROTEOLYTIC ENZYMES FROM MAMMALIAN PANCREAS GLANDS, WHICH COMPRISES EXTRACTING WITH A 33% UREA SOLUTION THE RESIDUAL GLAND MATERIAL RESULTING FROM THE TREATMENT OF MINCED PANCREAS GLAND WITH A CONVENTIONAL INSULIN EXTRACTING CONCENTRATION OF A SOLVENT ACIDIFIED WITH SULPHURIC ACID TO CREATE A PH VALUE BELOW 7, SAID SOLVENT BEING SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC ALCOHOLS CONTAINING LESS THAN THREE CARBON ATOMS AND ACETONE.
Claim 2
Independent Claim
69 words
A METHOD OF RECOVERING PROTEOLYTIC ENZYMES FROM MAMMALIAN PANCREAS GLANDS, WHICH COMPRISES EXTRACTING WITH A 33% UREA SOLUTION THE RESIDUAL GLAND MATERIAL RESULTING FROM THE TREATMENT OF MINCED PANCREAS GLAND WITH A CONVENTIONAL INSULIN EXTRACTING CONCENTRATION OF A SOLVENT ACIDIFIED WITH SULPHURIC ACID TO CREATE A PH VALUE BELOW 7, SAID SOLVENT BEING SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC ALCOHOLS CONTAINING LESS THAN THREE CARBON ATOMS AND ACETONE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |