Patent US3595853A successfully refreshed from Google Patents.
US3595853A
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US
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Ribofuranosyl cytosine and arabinofuranosyl cytosine derivatives
Assignee: Kohjin Holdings Co Ltd
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Filing: 1969-04-01
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Granted: 1971-07-27
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Expires: 1989-04-01
Abstract
Abstract THE INVENTION RELATES TO RIBOFURANOSYL CYTOSINE DERIVATIVES OF THE FORMULA 1-(3-(O3N-),4-X,5-(O3N-CH2-)TETRAHYDROFUR-2-YL)-,4-(H2N-), OR THEIR ACID SALTS IN WHICH X STANDS FOR OH OR ONO2, AND IT ALSO RELATES TO ARABINOFURANOSYL CYTOSINE DERIVATIVES OF THE FORMULA 1-(3-(HO-),4-X,5-(O3N-CH2-)TETRAHYDROFUR-2-YL)-,4-(H2N-), -1,2-DIHYDROPYRIMIDIN-2-ONE -1,2-DIHYDROPYRIMIDIN-2-ONE OR THEIR ACID SALTS, AND IT FURTHER RELATES TO A PROCESS FOR PROVIDING THE ABOVE ARABINOFURANOSYL CYTOSINE DERIVATIVES. THE RIBOFURANOSYL CYTOSINE DERIVATIVES OF THE INVENTION ARE VALUABLE INTERMEDIATE COMPOUNDS TO PROVIDE ARABINOFURANOSYL CYTOSINE.
Inventors
- 👤 Tadashi Kanai
- 👤 Chiaki Yamashita
- 👤 Motonobu Ichino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:08
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/06
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |