Patent US3909352A successfully refreshed from Google Patents.
US3909352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of yeast biomass
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1974-02-22
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Granted: 1975-09-30
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Expires: 1994-02-22
Abstract
Abstract A yeast biomass which is rich in intracellular RNA is produced by cultivating a microorganism of the genus Candida which is sensitive to potassium chloride. RNA has a wide application as condiments and pharmaceuticals.
Inventors
- 👤 Shunichi Akiyama
- 👤 Munebaru Doi
- 👤 Yoshiaki Arai
- 👤 Yoshio Nakao
- 👤 Hideo Fukuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:26
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/26; C12P19/28; C12P19/30; C12P19/34; C12N; C12N1/00; C12N1/14; C12N1/16; C12N1/26; C12N1/28; C12N1/32; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/921; Y10S435/922; Y10S435/923; Y10S435/924
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
87 words
A METHOD FOR PRODUCING YEAST BIOMASS WHICH COMPRISES, CULTIVATING A YEAST OF THE GENUS CANDIADA, WHICH IS SENSETIVE TO POTASSIUM CHLORIDE AND IS ABLE TO ASSIMILATE AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROCARBONS, FATTY ACIDS, ALCOHOLS, OILS AND FATS, IN A MEDIUM CONTAINING AT LEAST ONE OF SAID ASSIMIABLE CARBON SOURCES AS A PRINCIPAL CARBON SOURCE, THEREBY PRODUCING IN THE CULTIVATED MEDIUM THE YEAST BIOMASS WHICH CONTAINS NOT LESS THAN 12 PERCENT BY WEIGHT OF INTRACELLULAR RIBONUCLEIC ACID, AND RECOVERING SAID BIOMASS THEREFROM.
Claim 2
Independent Claim
87 words
A METHOD FOR PRODUCING YEAST BIOMASS WHICH COMPRISES, CULTIVATING A YEAST OF THE GENUS CANDIADA, WHICH IS SENSETIVE TO POTASSIUM CHLORIDE AND IS ABLE TO ASSIMILATE AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROCARBONS, FATTY ACIDS, ALCOHOLS, OILS AND FATS, IN A MEDIUM CONTAINING AT LEAST ONE OF SAID ASSIMIABLE CARBON SOURCES AS A PRINCIPAL CARBON SOURCE, THEREBY PRODUCING IN THE CULTIVATED MEDIUM THE YEAST BIOMASS WHICH CONTAINS NOT LESS THAN 12 PERCENT BY WEIGHT OF INTRACELLULAR RIBONUCLEIC ACID, AND RECOVERING SAID BIOMASS THEREFROM.
Claim 3
Dependent Claim
40 words
A process according to claim 1, wherein said yeast of the genus Candida is one belonging to any of the species Candida lipolytica, Candida tropicalis, Candida guilliermondii, Candida albicans, Candida intermedia, Candida krusei, Candida parapsilosis, Candida robusta, and Candida stellatoidea.
Claim 4
Dependent Claim
23 words
A process according to claim 1, wherein the resulting yeast biomass contains ribonucleic acid in amounts not less than 14 percent by weight.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |