US2591945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the recovery of protein from wool and other keratinous materials
Assignee: BOTANY MILLS Inc
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Filing: 1948-11-12
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Granted: 1952-04-08
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Expires: 1968-11-12
Abstract
No abstract record available.
Inventors
- 👤 Ernst C Koerner
- 👤 Ehrhardt Hugo
- 👤 Frederick R Haigh
- 👤 Kirchhof John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:01
CPC Classifications
A; A23; A23J; A23J1/00; A23J1/10; Y; Y10; Y10S; Y10S530/00; Y10S530/859
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
119 words
A PROCESS FOR THE RECOVERY OF PROTEIN CONTAINED IN KERATINOUS MATERIAL EXEMPLIFIED BY WOOL WASTE, COMPRISING THE STEPS OF SOFTENING THE KERATINOUS MATERIAL BY AN ACID BATH, NEUTRALIZING SAID ACID-TREATED KERATINOUS MATERIAL AND SUBJECTING SAID ACID-TREATED KERATINOUS MATERIAL TO A BATH OF ADJUSTED PH AT ABOUT 9 TO 9.5, SAID BATH CONSISTING OF FROM 12 TO 18 PARTS OF SODIUM SULFITE (NA2SO3) CALCULATED TO 100 PARTS OF WOOL, AND FROM 5 TO 7 PARTS OF SODIUM SULFIDE (NA2S) CALCULATED TO 100 PARTS OF WOOL, MAINTAINING SAID KERATINOUS MATERIAL IN SAID REDUCING BATH FOR A PERIOD OF FROM 1 TO 2 HOURS AT A TEMPERATURE FROM 120 TO 150* F., AND ACIDIFYING THE THUS TREATED MATERIAL THEREBY PRECIPITATING THE PROTEIN.
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) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |