Patent US4195334A successfully refreshed from Google Patents.
US4355032B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
9-(1,3-dihydroxy-2-propoxymethyl)guanine as antiviral agent
Assignee: Hoffmann La Roche Inc
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Filing: 1981-05-21
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Granted: 1990-10-30
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Expires: 2001-05-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:59
CPC Classifications
C; C07; C07D; C07D473/00; C07D473/02; C07D473/18; A; A61; A61P; A61P31/00; A61P31/12; A61P31/20; A61P31/22; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
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) | 1993-10-29 | 1994-04-30 | 1994-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-29 | 1998-04-30 | 1998-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-29 | 2002-04-30 | 2002-10-30 | $7700.00 | Window Closed / Lapsed |