US5053499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2',3'-dideoxy purine nucleoside
Assignee: Nippon Paper Industries Co Ltd
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Filing: 1989-08-03
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Granted: 1991-10-01
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Expires: 2009-08-03
Abstract
Abstract 2', 3'-Dideoxy purine nucleosides represented by following general formulae [I] and/or [II] ##STR1## (wherein X and Y indicate nitrogen atoms or carbon atoms and R 1 , R 2 , R 3 , R 4 and R 5 indicate each independently any of hydrogen atom, hydroxyl group, amino group, alkyl group, halogen atom, alkoxy group and mercapto group), process for the preparation thereof and applications thereof to the antiviral agent, antiretroviral agent, therapeutic drug and preventive drug for acquired immunodeficiency syndrome (AIDS), and experimental medicine and experimental reagent to be used in genetic engineering are claimed.
Inventors
- 👤 Eiji Kojima
- 👤 Hidetoshi Yoshioka
- 👤 Hidenori Fukinbara
- 👤 Kunichika Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:34
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/06; A; A61; A61P; A61P31/00; A61P31/12; C07H19/12; C07H19/14; C07H19/16; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/847; Y10S435/848; Y10S435/849; Y10S435/852
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
3 words
The compound 2-Amino-6-chloropurine-9-β-D-2',3'-dideoxyribofuranoside.
Claim 2
Dependent Claim
3 words
The compound 2-Amino-6-chloropurine-9-β-D-2',3'-dideoxyribofuranoside.
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) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |