US3419544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel preparation of 1,2,3,5-tetraacyl-beta-d-ribofuranoses
Assignee: Zellsloff Fabrik Waldhof AG
•
Filing: 1966-10-28
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Granted: 1968-12-31
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Expires: 1986-10-28
Abstract
No abstract record available.
Inventors
- 👤 Witzel Herbert
- 👤 Maurer Hans Karl
- 👤 Gassen Hans-Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:25
CPC Classifications
C; C07; C07H; C07H13/00; C07H13/02; C07H13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2827453A
Cited
US3196147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |