Patent US3271399A successfully refreshed from Google Patents.
US3271399A
Expired / Lapsed
US
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5-acyloxyuracils and their preparation
Assignee: SmithKline Beecham Corp
•
Filing: 1964-02-10
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Granted: 1966-09-06
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Expires: 1984-02-10
Abstract
No abstract record available.
Inventors
- 👤 George H Hitchings
- 👤 Gertrude B Elion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:33
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/02; C07D401/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
5-NICOTINOYLOXYURACIAL.
Claim 2
Dependent Claim
1 words
5-NICOTINOYLOXYURACIAL.
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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |