US4225673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing glucan having antitumor activity
Assignee: Individual
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Filing: 1979-02-16
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Granted: 1980-09-30
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Expires: 1999-02-16
Abstract
Abstract A simple glucan has the repeating unit structure ##STR1## and has a mean molecular weight of about two million. It is produced by culturing mycelia of Coriolus Versicolor Iwade FERM-P No. 2743, and subjecting the cultured medium to hot water extraction, ethanol precipitation, aqueous sodium acetate elution and ion exchange.
Inventors
- 👤 Mamoru Sugiura
- 👤 Hiroyuki Ohno
- 👤 Yutaro Sasaki
- 👤 Kazuaki Hama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:27
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/04; A; A61; A61K; A61K31/00; A61K31/70; A61K31/715; A61P; A61P35/00; C08; C08B; C08B37/00; C08B37/0006; C08B37/0024; C12N; C12N1/00; C12N1/14; C12N1/145; C12R; C12R2001/00; C12R2001/645; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A method of producing a glucan having a basic repeating unit structure ##STR4## and an estimated molecular weight of about two million, comprising culturing mycelia of Coriolus Versicolor Iwade FERM-P No. 2743 in a culture medium for Basidiomycetes, and recovering said glucan from the culture medium by subjecting the culture medium to hot water extraction, ethanol precipitation, aqueous sodium acetate elution and ion exchange.
Claim 2
Independent Claim
64 words
A method of producing a glucan having a basic repeating unit structure ##STR4## and an estimated molecular weight of about two million, comprising culturing mycelia of Coriolus Versicolor Iwade FERM-P No. 2743 in a culture medium for Basidiomycetes, and recovering said glucan from the culture medium by subjecting the culture medium to hot water extraction, ethanol precipitation, aqueous sodium acetate elution and ion exchange.
References Cited (Backward Citations)
US4051314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |