Patent US2680740A successfully refreshed from Google Patents.
US2680740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of
Assignee: —
•
Filing: —
•
Granted: 1954-06-08
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Expires: 1971-06-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:20
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; C07D239/48; C07D239/49
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS FOR PRODUCTION OF 2:4-DIAMINO5-(4'' - CHLOROPHENYL) -6-ETHYLPYRIMIDINE WHICH COMPRISES CONDENSING GUANIDINE WITH ETHYL 2(4''-CHLOROPHENYL) -3-PENTANONE-OATE IN A REACTION MEDIUM CONTAINING OLEUM OF 15-40% CONCENTRATION, TREATING WITH A PHOSPHORUS CHLORIDE A COMPOUND SELECTED FROM THE CLASS CONSISTING OF THE 2-AMINO-4-HYDROXY-5-(4''-CHLOROPHENYL)6-ETHYLPYRIMIDINE SO OBTAINED AND THE CORRESPONDING ACETYLATED COMPOUND,-AND TREATING WITH AMMONIA A COMPOUND SELECTED FROM THE CLASS CONSISTING OF THE 2-AMINO-4-CHLORO-5-(4''-CHLOROPHENYL)-6-ETHYLPYRIMIDINE AND THE CORRESPONDING 2-ACETYLAMINO COMPOUND SO OBTAINED.
Claim 2
Dependent Claim
68 words
A PROCESS FOR PRODUCTION OF 2:4-DIAMINO5-(4'' - CHLOROPHENYL) -6-ETHYLPYRIMIDINE WHICH COMPRISES CONDENSING GUANIDINE WITH ETHYL 2(4''-CHLOROPHENYL) -3-PENTANONE-OATE IN A REACTION MEDIUM CONTAINING OLEUM OF 15-40% CONCENTRATION, TREATING WITH A PHOSPHORUS CHLORIDE A COMPOUND SELECTED FROM THE CLASS CONSISTING OF THE 2-AMINO-4-HYDROXY-5-(4''-CHLOROPHENYL)6-ETHYLPYRIMIDINE SO OBTAINED AND THE CORRESPONDING ACETYLATED COMPOUND,-AND TREATING WITH AMMONIA A COMPOUND SELECTED FROM THE CLASS CONSISTING OF THE 2-AMINO-4-CHLORO-5-(4''-CHLOROPHENYL)-6-ETHYLPYRIMIDINE AND THE CORRESPONDING 2-ACETYLAMINO COMPOUND SO OBTAINED.
References Cited (Backward Citations)
US2579259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |