US2597566A
Expired / Lapsed
US
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Method of preparing a soluble protein from keratinaceous materials
Assignee: ELIOT D PRATT
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Filing: 1949-11-19
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Granted: 1952-05-20
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Expires: 1969-11-19
Abstract
No abstract record available.
Inventors
- 👤 Chiego Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:39
CPC Classifications
A; A23; A23J; A23J1/00; A23J1/10; Y; Y10; Y10S; Y10S426/00; Y10S426/807
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
THE METHOD OF PREPARING FROM KERATINACEOUS MATERIALS, A SOLUBLE PROTEIN THAT IS HIGHLY EDIBLE AS AN ANIMAL AND POULTRY FOOD AND THAT IS FREE FROM OBJECTIONAL COLORS, WHICH CONSISTS IN SUBJECTING SAID MATERIALS TO THE ACTION OF OXIDES AND HYDROXIDES FROM THE GROUP CONSISTING OF CALCIUM AND MAGNESIUM AND MIXTURE THEREOF, TOGETHER WITH A SMALL AMOUNT OF BISULFITE SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM, IN WATER AT A STEAM GAUGE PRESSURE RANGING FROM APPROXIMATELY 50 TO 100 LBS. AND FOR APPROXIMATELY 1 TO 3 HOURS, THEN REDUCING THE PRESSURE AND SEPARATING THE RESIDUE FROM THE SOLUTION CONTAINING THE KERATINACEOUS MATERIAL, THEN FILTERING THE SOLUTION AND DRYING THE FILTERED MATERIAL.
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) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |