US4168201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of increasing yeast yield
Assignee: Burns Philp Food Inc
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Filing: 1977-08-29
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Granted: 1979-09-18
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Expires: 1997-08-29
Abstract
Abstract A method of increasing yield of yeast cells on a carbon source of crude methanol or crude ethanol is given.
Inventors
- 👤 Eugene H. Wegner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:34
CPC Classifications
C; C12; C12N; C12N1/00; C12N1/32; C12N1/38; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/93
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
124 words
A process for increasing the yield of yeasts on a carbon source selected from the group consisting of crude methanol containing 2-methyl-1-propanol as an impurity, crude ethanol containing 2-methyl-1-propanol as an impurity, and mixtures thereof, and said yeasts being such that they utilize as a carbon source an alcohol selected from the group consisting of methanol, ethanol, and mixtures thereof, and said yeasts being such that 2-methyl-1-propanol is detrimental to their growth, said process comprising: a. separating and removing 2-methyl-1-propanol from said carbon source thereby producing a purified carbon source containing methanol, ethanol or mixtures thereof; and b. introducing said purified carbon source to a fermenter containing a quantity of said yeasts and operating said fermenter under fermentation conditions wherein said yeasts will propagate.
Claim 2
Dependent Claim
124 words
A process for increasing the yield of yeasts on a carbon source selected from the group consisting of crude methanol containing 2-methyl-1-propanol as an impurity, crude ethanol containing 2-methyl-1-propanol as an impurity, and mixtures thereof, and said yeasts being such that they utilize as a carbon source an alcohol selected from the group consisting of methanol, ethanol, and mixtures thereof, and said yeasts being such that 2-methyl-1-propanol is detrimental to their growth, said process comprising: a. separating and removing 2-methyl-1-propanol from said carbon source thereby producing a purified carbon source containing methanol, ethanol or mixtures thereof; and b. introducing said purified carbon source to a fermenter containing a quantity of said yeasts and operating said fermenter under fermentation conditions wherein said yeasts will propagate.
Claim 3
Dependent Claim
13 words
A process according to claim 1 wherein said carbon source is crude methanol.
Claim 4
Dependent Claim
17 words
A process according to claim 2 wherein said 2-methyl-1-propanol is separated from said crude methanol by distillation.
Claim 5
Dependent Claim
30 words
A process according to claim 1 wherein said yeasts are of a genus in the group of genera comprising Candida, Hansenula, Torulopsis, Saccharomyces, Pichia, Debaryomyces, Lipomyces, Cryptococcus, Nematospora, and Brettanomyces.
Claim 6
Dependent Claim
25 words
A process according to claim 1 wherein said yeasts are of a genus in the group of genera comprising Candida, Hansenula, Torulopsis, Pichia, and Saccharomyces.
Claim 7
Dependent Claim
14 words
A process according to claim 3 wherein said yeasts are of the genus Hansenula.
Claim 8
Dependent Claim
15 words
A process according to claim 6 wherein said yeasts are of the species Hansenula polymorpha.
Claim 9
Dependent Claim
26 words
A process according to claim 7, wherein said fermentation is carried out at a temperature within the range from about 25° C. to about 65° C.
Claim 10
Dependent Claim
26 words
A process according to claim 7, wherein said fermentation is carried out at a temperature within the range from about 28° C. to about 50° C.
Claim 11
Dependent Claim
15 words
A process according to claim 9, wherein said fermentation is conducted as a continuous operation.
Claim 12
Dependent Claim
28 words
A process according to claim 10, wherein the volume ratio of added alcohol to added aqueous mineral medium is within the range of about 0.8:9.2 to about 4.5:5.5.
References Cited (Backward Citations)
GB1210770A
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US3844893A
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US3879261A
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US3878045A
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US3929578A
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US3954561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-17 | 1983-03-19 | 1983-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-17 | 1987-03-19 | 1987-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-17 | 1991-03-19 | 1991-09-18 | $7700.00 | Window Closed / Lapsed |