US3284439A
Expired / Lapsed
US
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Process for the preparation of methyl alpha-thiolincosaminide and 4-ethyl-l-hygric acid hydrazide
Assignee: Pharmacia and Upjohn Co
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Filing: 1964-06-15
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Granted: 1966-11-08
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Expires: 1984-06-15
Abstract
No abstract record available.
Inventors
- 👤 Alexander D Argoudelis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:01
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/04; C07D207/10; C07D207/16; C07H; C07H15/00; C07H15/02; C07H15/14; C07H15/16; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/02; Y10S516/07
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
38 words
A PROCESS FOR THE PRODUCTION OF METHYL A-THIOLINCOSAMINIDE AND 4-ETHYLE-L-HYGRIC ACID HYDRAZIDE WHICH COMPRISES: HEATING LINCOMYCIN B FREE BASE OF FORMULA: 2-(CH3-S-),3,4,5-TRI(HO-),6-((1-CH3,4-(C2H5-)-2WITH HYDRAZINE HYDRATE TO OBTAIN METHYL A-THIOLINCOSAMINDE OF THE FORMULA: 2-(CH3-S-),3,4,5-TRI(HO-),6-(CH3-CH(-OH)-CH(-NH2)-) PYRROLIDINYL)-CO-NH-CH(-CH(-OH)-CH3)-)TETRAHYDROPYRAN TETRAHYDROPYRAN AND 4-ETHYL-L-HYGRIC ACID HYDRAZIDE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |