Patent US3598807A successfully refreshed from Google Patents.
US3598807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrazole compounds and process for preparing the same
Assignee: KH Neochem Co Ltd
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Filing: 1969-08-05
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Granted: 1971-08-10
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Expires: 1989-08-05
Abstract
Abstract 3(5)-AMINO-4-PYRAZOLE-CARBOXAMIDE, THE 1 - B-D-RIBOFURANOSIDE THEREOF AND THE 1-B-D-RIBOFURANOSIDE-5''-PHOSPHORIC ACID ESTER THEREOF ARE PREPARED BY HEATING THE CORRESPONDING 4-OXY-1H-PYRAZOLO(3,4-D)-PYRIMIDINE AND ITS DERIVATIVES AT A TEMPERATURE OF UP OT 180*C., PREFERABLY 100 -140*C., IN AN AQUEOUS SOLUTION HAVING AN ALKALINE PH, PREFERABLY 9.0-13.0. THE PRODUCTS DISPLAY ANTI-BACTERIAL ACTIVITY AND ARE USEFUL FOR THE STUDY OF NUCLEIC ACID METABOLISM.
Inventors
- 👤 Kiyoshi Nakayama
- 👤 Haruo Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:13
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/38; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/14
Claims Analysis
Total Claims: 0
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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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |