US2493489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of converting mannosidostreptomycin and dihydromannosidostreptomycin into streptomycin and dihydrostreptomycin, respectively
Assignee: ER Squibb and Sons LLC
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Filing: 1948-11-27
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Granted: 1950-01-03
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Expires: 1968-11-27
Abstract
No abstract record available.
Inventors
- 👤 Asger F Langlykke
- 👤 Perlman David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:51
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/20; C07H15/22; C07H15/238; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886; Y10S435/897
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
THE METHOD OF CONVERTING A MEMBER OF THE GROUP CONSISTING OF MANNOSIDOSTREPTOMYCIN AND DIHYDROMANNOSIDOSTREPTOMYCIN INTO STREPTOMYCIN AND DIHYDROSTREPTOMYCIN, RESPECTIVELY, WHICH COMPRISES ADDING A MEMBER OF SAID GROUP TO A GROWING CULTURE OF A STREPTOMYCIN-PRODUCING STRAIN OF STREPTOMYCES GRISEUS.
Claim 2
Independent Claim
38 words
THE METHOD OF CONVERTING A MEMBER OF THE GROUP CONSISTING OF MANNOSIDOSTREPTOMYCIN AND DIHYDROMANNOSIDOSTREPTOMYCIN INTO STREPTOMYCIN AND DIHYDROSTREPTOMYCIN, RESPECTIVELY, WHICH COMPRISES ADDING A MEMBER OF SAID GROUP TO A GROWING CULTURE OF A STREPTOMYCIN-PRODUCING STRAIN OF STREPTOMYCES GRISEUS.
References Cited (Backward Citations)
US2449866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |