US3278518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing nucleosides
Assignee: Hoechst AG
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Filing: 1964-07-09
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Granted: 1966-10-11
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Expires: 1984-07-09
Abstract
No abstract record available.
Inventors
- 👤 Schramm Gerhard
- 👤 Grotsch Horst
- 👤 Pollmann Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:57
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/16; C07H21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS OF PREPARING NUCLEOSIDES WHICH COMPRISES REACTING A MEMBER SELECTED FROM THE GROUP CONSISTING OF MONOSACCHARIDES HAVING FROM 5 TO 6 CARBON ATOMS IN A STRAIGHT CHAIN AND APURINE ACIDS, WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF PYRIMIDINE BASES AND PURINE BASES IN THE PRESENCE OF A CYCLIC POLYPHOSPHORIC ACID LOWER ALKYL ESTER AND OF A SOLVENT FOR SAID SUGAR AND BASE, WHICH SOLVENT IS INWERT TO SAID SUGAR BASE, AT A TEMPERATURE OF FROM : TO 65* C.
Claim 2
Dependent Claim
82 words
A PROCESS OF PREPARING NUCLEOSIDES WHICH COMPRISES REACTING A MEMBER SELECTED FROM THE GROUP CONSISTING OF MONOSACCHARIDES HAVING FROM 5 TO 6 CARBON ATOMS IN A STRAIGHT CHAIN AND APURINE ACIDS, WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF PYRIMIDINE BASES AND PURINE BASES IN THE PRESENCE OF A CYCLIC POLYPHOSPHORIC ACID LOWER ALKYL ESTER AND OF A SOLVENT FOR SAID SUGAR AND BASE, WHICH SOLVENT IS INWERT TO SAID SUGAR BASE, AT A TEMPERATURE OF FROM : TO 65* C.
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |