US3990944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of alcohol from cellulosic materials using plural ferments
Assignee: Bio Research Center Co Ltd
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Filing: 1975-09-08
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Granted: 1976-11-09
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Expires: 1995-09-08
Abstract
Abstract Alcohol is manufactured from cellulosic materials by a one-step process involving the simultaneous reaction of a cellulosic material, a cellulase and an alcohol-producing microorganism.
Inventors
- 👤 William Frederick Gauss
- 👤 Shuzo Suzuki
- 👤 Motoyoshi Takagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:51
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/02; C12P7/04; C12P7/06; C12P7/08; C12P7/10; Y; Y02; Y02E; Y02E50/00; Y02E50/10; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/94; Y10S435/942; Y10S435/945
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
65 words
In the manufacture of alcohol from a cellulosic material, wherein the cellulosic material is enzymatically saccharified to glucose by a separately prepared cellulase and the glucose is fermented in the presence of an alcohol-producing microorganism to obtain alcohol, the improvement which comprises: simultaneously reacting under anaerobic conditions said cellulosic material, said separately prepared cellulase and said alcohol-producing microorganism, whereby greater yields of alcohol are obtained.
Claim 2
Dependent Claim
65 words
In the manufacture of alcohol from a cellulosic material, wherein the cellulosic material is enzymatically saccharified to glucose by a separately prepared cellulase and the glucose is fermented in the presence of an alcohol-producing microorganism to obtain alcohol, the improvement which comprises: simultaneously reacting under anaerobic conditions said cellulosic material, said separately prepared cellulase and said alcohol-producing microorganism, whereby greater yields of alcohol are obtained.
Claim 3
Dependent Claim
19 words
The process of claim 1, wherein the reaction is carried out at a temperature of 25° to 35° C.
Claim 4
Dependent Claim
20 words
The process of claim 2, wherein the cellulase is derived from Trichoderma viride and the alcohol-producing microorganism is Saccharomyces cerevisiae.
Claim 5
Dependent Claim
54 words
The process of claim 1, wherein the cellulase is derived from the cultivation of a cellulolytic microorganism in an aqueous nutrient medium in the presence of a cellulosic material and is used in the form of the entire aqueous culture broth obtained in such cultivation or an aliquot thereof without separation of any component.
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) | 1979-11-09 | 1980-05-10 | 1980-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-09 | 1984-05-10 | 1984-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-09 | 1988-05-10 | 1988-11-09 | $7700.00 | Window Closed / Lapsed |