US2773061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making 4-(p-aminobenzenesulphonyl) amino-pyrimidines
Assignee: Individual
•
Filing: 1953-05-22
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Granted: 1956-12-04
•
Expires: 1973-05-22
Abstract
No abstract record available.
Inventors
- 👤 Loop Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:51
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/69
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
58 words
A METHOD OF MANUFACTURING 4-(P-AMINOBENZENESULFONYL)-AMINO-2,6-DIMETHYLPYRIMIDINE, COMPRISING THE STEPS OF REACTING ONE MOL OF DRY 4-AMINO-2,6-DIMETHYLPYRIMIDINE WITH ABOUT TWO MOLS OF DRY P-ACETYLSULPHANILIC ACID CHLORIDE IN THE PRESENCE OF AN ORGANIC SOLVENT FREE OF HYDROXYL GROUPS AND IN THE FURTHER PRESENCE OF ABOUT TWO MOLS OF TRIMETHYLAMINE, THEREBY FORMING A REACTION PRODUCT; AND SUBJECTING SAID REACTION PRODUCT TO HYDROLYSIS.
References Cited (Backward Citations)
US2430439A
Cited
GB547976A
Cited
FR886009A
Cited
US2429184A
Cited
US2508450A
Cited
GB582149A
Cited
BE495650A
Cited
FR990388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |