Patent US3309359A successfully refreshed from Google Patents.
US3309359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-mono-acyl-5-fluorocytosine derivatives and process
Assignee: F Hoffmann La Roche AG
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Filing: 1965-10-22
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Granted: 1967-03-14
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Duschinsky Robert
- 👤 Hoffer Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:24
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; C07D239/47; A; A61; A61K; A61K31/00; A61K31/70; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
2 words
N-LOWER ALKANOYL-5-FLUOROCYTOSINE.
Claim 2
Dependent Claim
2 words
N-LOWER ALKANOYL-5-FLUOROCYTOSINE.
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |