US3847898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N4-trihaloethoxy carbonyl arabino-furanosyl cytosine 5'-esters
Assignee: Pharmacia and Upjohn Co
•
Filing: 1970-02-16
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Granted: 1974-11-12
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Expires: 1990-02-16
Abstract
Abstract 1. A COMPOUND HAVING THE FOLLOWING STRUCTURE: 1-((2,4-DI(HO-),5-(Y-O-CH2-)-TETRAHYDROFUR-2-YL)-),2-(O=), 4-(X3C-CH2-OOC-NH-)-1,2-DIHYDROPYRIMIDINE IN WHICH X IS BROMINE OR CHLORINE AND Y IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN, TRITYL, AND AN ORGANIC CARBOXYLIC ACYL RADICAL.
Inventors
- 👤 R Kelly
- 👤 W Wechter
- 👤 D Gish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:26
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A COMPOUND HAVING THE FOLLOWING STRUCTURE:
Claim 2
Dependent Claim
6 words
A COMPOUND HAVING THE FOLLOWING STRUCTURE:
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |