US2958632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovery of highly active, stable, substantially sterile, soluble, proteolytic, enzyme composition from commercial crude papain
Assignee: SCHWARZ LAB Inc
•
Filing: 1955-12-28
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Granted: 1960-11-01
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Expires: 1975-12-28
Abstract
No abstract record available.
Inventors
- 👤 David R Schwarz
- 👤 Ralph C Golyzniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:37
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/14; C12N9/48; C12N9/50; C12N9/63; Y; Y10; Y10S; Y10S435/00; Y10S435/814; Y10S435/816
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
THE PROCESS FOR RECOVERING A HIGHLY ACTIVE, STABLE, SUBSTANTIALLY STERILE, SOLUBLE, PROTEOLYTIC ENZYME COMPOSITION FROM COMMERICAL CRUDE PAPAIN WHICH COMPRISES EXTRACTING THE CRUDE PAPAIN WITH AN AQUEOUS SOLUTION CONTAINING 1 TO 4 PERCENT OF AVAILABLE SO2 AND 0.5 TO 3 PERCENT OF A CHELATING AGENT SELECTED FROM THE GROUP CONSISTING OF ETHYLENE DIAMINE TETRA ACETIC ACID, PHYTIC ACID, AND RECOVERING THE SOLIDS THEREFROM BY SPRAYING THE CLARIFIED EXTRACT INTO A BLAST OF AIR HEATED TO BETWEEN 250 AND 600*F.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |