Patent US3347846A successfully refreshed from Google Patents.
US3347846A
Expired / Lapsed
US
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Method of preparing 5'-ribonucleotide
Assignee: Individual
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Filing: 1965-06-23
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Granted: 1967-10-17
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Expires: 1985-06-23
Abstract
No abstract record available.
Inventors
- 👤 Yoshikawa Masaharu
- 👤 Kusashio Koji
- 👤 Kato Tetsuya
- 👤 Takenishi Tadao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:23
CPC Classifications
C; C07; C07H; C07H1/00; C07H1/02; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A METHOD OF PREPARING A 2'',3''-O-PROTECTED 5''-RIBONUCLEOTIDE FROM A CORRESPONDING 2'',3''-O-PROTECTED NUCLEOSIDE WHICH COMPRISES REACTING SAID 2'',3''-O-PROTECTED RIBONUCLEOSIDE WITH A PHOSPHORYLATING AGENT SELECTED FROM THE GROUP CONSISTING OF PHOSPHORYL CHLORIDE AND TETRACHLOROPYROPHOSPHATE IN THE PRESENCE OF A TRIALKYL PHOSPHATE, AND HYDROLYZING THE 2'',3''-O-PROTECTED RIBONUCLEOSIDE PHOSPHORODICHLOROIDATE SO FORMED TO THE CORRESPONDING 2'',3''-O-PROTECTED-5''-RIBONUCLEOTIDE, THE ALKYL RADICALS OF SAID TRIALKYL PHOSPHATE HAVING NOT MORE THAN TEN CARBON ATOMS EACH.
Claim 2
Independent Claim
66 words
A METHOD OF PREPARING A 2'',3''-O-PROTECTED 5''-RIBONUCLEOTIDE FROM A CORRESPONDING 2'',3''-O-PROTECTED NUCLEOSIDE WHICH COMPRISES REACTING SAID 2'',3''-O-PROTECTED RIBONUCLEOSIDE WITH A PHOSPHORYLATING AGENT SELECTED FROM THE GROUP CONSISTING OF PHOSPHORYL CHLORIDE AND TETRACHLOROPYROPHOSPHATE IN THE PRESENCE OF A TRIALKYL PHOSPHATE, AND HYDROLYZING THE 2'',3''-O-PROTECTED RIBONUCLEOSIDE PHOSPHORODICHLOROIDATE SO FORMED TO THE CORRESPONDING 2'',3''-O-PROTECTED-5''-RIBONUCLEOTIDE, THE ALKYL RADICALS OF SAID TRIALKYL PHOSPHATE HAVING NOT MORE THAN TEN CARBON ATOMS EACH.
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) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |