US3201389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing ribonucleoside-5'-phosphates or their salts from ribonucleosides
Assignee: KH Neochem Co Ltd
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Filing: 1963-09-23
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Granted: 1965-08-17
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Expires: 1983-09-23
Abstract
No abstract record available.
Inventors
- 👤 Fujimoto Yasuo
- 👤 Naruse Masao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:55
CPC Classifications
C; C07; C07H; C07H1/00; C07H1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN A PROCESS FOR PREPARING 2'',3''-O-SUBSTITUTED RIBONUCLEOSIDE BY RACTING THE CORRESPONDING 2''-OH,3''-OH RIBONUCLOESIDE WITH CARBONYL COMPOUND IN THE PRESENCE OF A CATALYST, THE IMPROVEMENT ACCORDING TO WHICH THE CATALYST IS CONCURRETNLY CATALYST FOR THE CONDENSATION REACTION INVOLVING THE CARBONYL COMPOUND AND PHOSPHORYLATING AGENT FOR THE PHOSPHORLYATION OF THE 2'',3''-OSUBSTITUTED RIBONUCLEOSIDE RESULTING FROM SAID CONDENSATION WHEREBY ISOLATION OF THE LAST-NAMED NUCLEOSIDE AND SEPARATION OF CATALYST FROM THE REACTION MIXTURE ARE RENDERED SUPERFLUOUS AS A STEP ANTECENDENT TO PHOSPHORYLATION OF THE SAID NUCLEOSIDE.
Claim 2
Dependent Claim
81 words
IN A PROCESS FOR PREPARING 2'',3''-O-SUBSTITUTED RIBONUCLEOSIDE BY RACTING THE CORRESPONDING 2''-OH,3''-OH RIBONUCLOESIDE WITH CARBONYL COMPOUND IN THE PRESENCE OF A CATALYST, THE IMPROVEMENT ACCORDING TO WHICH THE CATALYST IS CONCURRETNLY CATALYST FOR THE CONDENSATION REACTION INVOLVING THE CARBONYL COMPOUND AND PHOSPHORYLATING AGENT FOR THE PHOSPHORLYATION OF THE 2'',3''-OSUBSTITUTED RIBONUCLEOSIDE RESULTING FROM SAID CONDENSATION WHEREBY ISOLATION OF THE LAST-NAMED NUCLEOSIDE AND SEPARATION OF CATALYST FROM THE REACTION MIXTURE ARE RENDERED SUPERFLUOUS AS A STEP ANTECENDENT TO PHOSPHORYLATION OF THE SAID NUCLEOSIDE.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |