US2508450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
5-(p-aminobenzene sulfonamido)-1, 3 dimethyl-2, 4 dioxo-6-amino-tetrahydropyrimidineand its preparation
Assignee: AG VORM B SIEGFRIED
•
Filing: 1947-06-19
•
Granted: 1950-05-23
•
Expires: 1967-06-19
Abstract
No abstract record available.
Inventors
- 👤 Demolis Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:10
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/69
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
87 words
A PROCESS FOR PRODUCING 5-(P-AMINOBENZENE SULFONAMIDO) - 1,3-DIMETHYL-2,4-DIOXO-6-AMINOTETRAHYDROPYRIMIDINE WHICH COMPRISES REACTING A BENZENE SULFONIC ACID COMPOUND SELECTED FROM THE GROUP CONSISTING OF BENZENE SULFONIC HALIDES AND BENZENE SULFONIC ESTERS HAVING A NITROGENCONTAINING SUBSTITUENT CONVERTIBLE INTO THE AMINO GROUP IN THE PARA POSITION SELECTED FROM THE GROUP CONSISTING OF NO2 AND ACYLAMINO RADICALS WITH 1,3 - DIMETHYL-2,4-DIOXO-5,6-DIAMINO-TETRAHYDROPYRIMIDINE TO PRODUCE A 5-(BENZENE-SULFONAMIDO) - 1.3-DIMETHYL-2,4-DIOXO-6-AMINO-TETRAHYDROPYRIMIDINE HAVING SAID NITROGEN-CONTAINING SUBSTITUENT IN THE PARA POSITION OF THE BENZENE RING, AND CONVERTING SAID NITROGEN-CONTAINING SUBSTITUENT OF THE OBTAINED REACTION PRODUCT INTO THE NH2-GROUP.
Claim 2
Dependent Claim
87 words
A PROCESS FOR PRODUCING 5-(P-AMINOBENZENE SULFONAMIDO) - 1,3-DIMETHYL-2,4-DIOXO-6-AMINOTETRAHYDROPYRIMIDINE WHICH COMPRISES REACTING A BENZENE SULFONIC ACID COMPOUND SELECTED FROM THE GROUP CONSISTING OF BENZENE SULFONIC HALIDES AND BENZENE SULFONIC ESTERS HAVING A NITROGENCONTAINING SUBSTITUENT CONVERTIBLE INTO THE AMINO GROUP IN THE PARA POSITION SELECTED FROM THE GROUP CONSISTING OF NO2 AND ACYLAMINO RADICALS WITH 1,3 - DIMETHYL-2,4-DIOXO-5,6-DIAMINO-TETRAHYDROPYRIMIDINE TO PRODUCE A 5-(BENZENE-SULFONAMIDO) - 1.3-DIMETHYL-2,4-DIOXO-6-AMINO-TETRAHYDROPYRIMIDINE HAVING SAID NITROGEN-CONTAINING SUBSTITUENT IN THE PARA POSITION OF THE BENZENE RING, AND CONVERTING SAID NITROGEN-CONTAINING SUBSTITUENT OF THE OBTAINED REACTION PRODUCT INTO THE NH2-GROUP.
Claim 3
Dependent Claim
6 words
A NEW COMPOUND, 5-9P-AMINOBENZENE SULFONAMIDO)-1,3-DIMETHYL-2,4-DIOXO-6-AMINO -TETRAHYDROPYRIMIDINE.
Claim 4
Dependent Claim
6 words
A NEW COMPOUND, 5-9P-AMINOBENZENE SULFONAMIDO)-1,3-DIMETHYL-2,4-DIOXO-6-AMINO -TETRAHYDROPYRIMIDINE.
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) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |