US3501456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arabinofuranosyl nucleosides and intermediates
Assignee: Merck and Co Inc
•
Filing: 1967-08-08
•
Granted: 1970-03-17
•
Expires: 1987-08-08
Abstract
No abstract record available.
Inventors
- 👤 Tsung-Ying Shen
- 👤 Thomas Neilson
- 👤 William V Ruyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:01
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/18; C07H15/02; C07H15/04; C07H19/00; C07H19/02; C07H19/04; C07H19/044; C07H19/06; C07H19/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2875194A
Cited
US3281410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |