Patent US3116282A successfully refreshed from Google Patents.
US3116282A
Expired / Lapsed
US
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Pyrimidine nucleosides and process
Assignee: Pharmacia and Upjohn Co
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Filing: 1960-04-27
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Granted: 1963-12-31
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Expires: 1980-04-27
Abstract
No abstract record available.
Inventors
- 👤 James H Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:20
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
56 words
THE PROCESS WHICH COMPRISES REACTING PHOSPHORUS PENTASULFIDE WITH A FULLY ACYLATED URACIL-1-NUCLEOSIDE, WHEREIN THE ACYL GROUPS ARE THOSE OF A MONOCARBOXYLIC ACID, TO PRODUCE THE CORRESPONDING FULLY ACYLATED 4-THIOURACIL-1-NUCLEOSIDE, AND HYDROLYZING THE ACYL GROUPS AND SUBSTITUTING AN AMINO GROUP AT THE 4-POSITION BY REACTON WITH A BASIC NITROGENOUS COMPOUND HAVING A REPLACEABLE N-HYDROGEN TO PRODUCE CYTOSINE-1-NUCLEOSIDE.
Claim 2
Dependent Claim
56 words
THE PROCESS WHICH COMPRISES REACTING PHOSPHORUS PENTASULFIDE WITH A FULLY ACYLATED URACIL-1-NUCLEOSIDE, WHEREIN THE ACYL GROUPS ARE THOSE OF A MONOCARBOXYLIC ACID, TO PRODUCE THE CORRESPONDING FULLY ACYLATED 4-THIOURACIL-1-NUCLEOSIDE, AND HYDROLYZING THE ACYL GROUPS AND SUBSTITUTING AN AMINO GROUP AT THE 4-POSITION BY REACTON WITH A BASIC NITROGENOUS COMPOUND HAVING A REPLACEABLE N-HYDROGEN TO PRODUCE CYTOSINE-1-NUCLEOSIDE.
Claim 3
Dependent Claim
8 words
FULLY ACYLATED 4-THIOURACIL-1-NUCLEOSIDE HAVING THE FOLLOWING STRUCTURAL FORMULA:
Claim 4
Dependent Claim
8 words
FULLY ACYLATED 4-THIOURACIL-1-NUCLEOSIDE HAVING THE FOLLOWING STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2815342A
Cited
US3002965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |