Patent US3940382A successfully refreshed from Google Patents.
US3940382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,2'-Di-N-substituted kanamycin B compounds
Assignee: Microbial Chemistry Research Foundation
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Filing: 1974-08-22
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Granted: 1976-02-24
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Expires: 1994-08-22
Abstract
Abstract New antibacterial agents, 1,2'-di-N-( alpha -hydroxyaminoacyl)-kanamycin B and 1,2'-di-N-( alpha -hydroxyaminoacyl)-3',4'-dideoxy kanamycin B are described together with methods for their preparation and use.
Inventors
- 👤 Hamao Umezawa
- 👤 Kenji Maeda
- 👤 Shinichi Kondo
- 👤 Sumio Umezawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:26
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/20; C07H15/22; C07H15/222; C07H15/226; C07H15/234; A; A61; A61P; A61P31/00; A61P31/04; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
23 words
A compound selected from the group consisting of 1,2'-di-N-(4-amino-2-hydroxybutyryl)-kanamycin B; 1,2'-di-N-(4-amino-2-hydroxybutyryl)-3',4'-dideoxykanamycin B; 1,2'-di-N-isoserylkanamycin B; 1,2'-di-N-isoseryl-3',4'-dideoxykanamycin B; and the pharmaceutically acceptable acid-addition salts thereof.
Claim 2
Dependent Claim
23 words
A compound selected from the group consisting of 1,2'-di-N-(4-amino-2-hydroxybutyryl)-kanamycin B; 1,2'-di-N-(4-amino-2-hydroxybutyryl)-3',4'-dideoxykanamycin B; 1,2'-di-N-isoserylkanamycin B; 1,2'-di-N-isoseryl-3',4'-dideoxykanamycin B; and the pharmaceutically acceptable acid-addition salts thereof.
Claim 3
Dependent Claim
11 words
A compound as claimed in claim 1 which is 1,2'-di-N-(4-amino-2-hydroxybutyryl)-kanamycin B.
Claim 4
Dependent Claim
11 words
A compound as claimed in claim 1 which is 1,2'-di-N-(4-amino-2-hydroxybutyryl)-3',4'-dideoxykanamycin B.
Claim 5
Dependent Claim
11 words
A compound as claimed in claim 1 which is 1,2'-di-N-isoserylkanamycin B.
Claim 6
Dependent Claim
11 words
A compound as claimed in claim 1 which is 1,2'-di-N-isoseryl-3',4'-dideoxykanamycin B.
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) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |