US3225029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of nucleosides and products obtained thereby
Assignee: Individual
•
Filing: 1963-02-28
•
Granted: 1965-12-21
•
Expires: 1983-02-28
Abstract
No abstract record available.
Inventors
- 👤 Yamaoka Naotaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:40
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/16; C07H1/00; C07H1/02; C07H19/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
3 words
2,6,8-TRICHLORO-9-(HEPTA-O-ACETYL-B-D - CELLOBISYL)PURINE.
Claim 2
Dependent Claim
3 words
2,6,8-TRICHLORO-9-(HEPTA-O-ACETYL-B-D - CELLOBISYL)PURINE.
Claim 3
Dependent Claim
84 words
IN THE PREPARATION OF NUCLEOSIDES BY CONDENSING HETEROCYCLIC COMPOUNDS, SELECTED FROM THE GROUP CONSISTING OF PURINES, PYRIMIDINES AND BENZIMIDAZOLES, AND ACYL GLUCOSYL HALIDES UNDER LIBERATION OF HYDROGEN HALIDE, THE IMPROVEMENT WHICH CONSISTS IN CARRYING OUT THE REACTION IN AN ANHYDROUS, INERT SOLVENT CONTAINING AN ACID ACCEPTOR FOR SAID LIBERATED HYDROGEN HALIDE, WHICH ACID ACCEPTOR IS SELECTED FROM THE GORUP CONSISTING OF SILVER AND CADMIUM, AND AND MERCURY, THE CARBONATES OF SILVER AND CADMIUM, AND THE CYANIDES OF SILVER, MRCURY, CADMIUM, POTASSIUM, BARIUM AND ZINC.
Claim 4
Dependent Claim
84 words
IN THE PREPARATION OF NUCLEOSIDES BY CONDENSING HETEROCYCLIC COMPOUNDS, SELECTED FROM THE GROUP CONSISTING OF PURINES, PYRIMIDINES AND BENZIMIDAZOLES, AND ACYL GLUCOSYL HALIDES UNDER LIBERATION OF HYDROGEN HALIDE, THE IMPROVEMENT WHICH CONSISTS IN CARRYING OUT THE REACTION IN AN ANHYDROUS, INERT SOLVENT CONTAINING AN ACID ACCEPTOR FOR SAID LIBERATED HYDROGEN HALIDE, WHICH ACID ACCEPTOR IS SELECTED FROM THE GORUP CONSISTING OF SILVER AND CADMIUM, AND AND MERCURY, THE CARBONATES OF SILVER AND CADMIUM, AND THE CYANIDES OF SILVER, MRCURY, CADMIUM, POTASSIUM, BARIUM AND ZINC.
References Cited (Backward Citations)
US2852505A
Cited
US3014900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |