Patent US2587262A successfully refreshed from Google Patents.
US2587262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chs chzghjoh
Assignee: —
•
Filing: —
•
Granted: 1952-02-26
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Expires: 1969-02-26
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:40
CPC Classifications
C; C07; C07D; C07D403/00; C07D403/14; C07D403/02; C07D403/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
THE PROCESS THAT COMPRISES REACTING 2METHYL - 3 - (B - HYDROXYETHYL) - PYRIDINE AND 2METHYL - 5- BROMOMETHYL-6-AMINOPYRIMIDINE DIHYDROBROMIDE IN THE PRESENCE OF A SOLVENT SELECTED FROM THE CLASS CONSISTING OF SOLVENT OF ACETONITRILE, ACETONE, AND A LOWER ALIPHATIC ALCOHOL AT A TEMPERATURE OF BETWEEN 0* AND 27* C., RECOVERING 1((4- AMINO - 2 - METHYL)-5-PYRIMIDYLMETHYL)-2METHYL-3-(B-HYDROXYETHYL)-5-PYRIDINIUM BROMIDE HYDROBROMIDE THUS FORMED, REACTING THE LATTER COMPOUND WITH PICRIC ACID, RECOVERING THE DIPICRATE OF 1-(4 -AMINO - 2 - METHYL)-5-PYRIMIDYLMETHYL)-2-METHYL-3-(B - HYDROXYETHYL)-PYRIDINE THUS FORMED, REACTING THE LATTER COMPOUND WITH HYDROCHLORIC ACID AND RECOVERING 1-(4-AMINO-2METHYL) -5-PYRIMIDYLMETHYL)-2-METHYL-3-(B-HYDROXYETHYL)-PYRIDINIUM CHLORIDE HYDROCHLORIDE.
Claim 2
Dependent Claim
95 words
THE PROCESS THAT COMPRISES REACTING 2METHYL - 3 - (B - HYDROXYETHYL) - PYRIDINE AND 2METHYL - 5- BROMOMETHYL-6-AMINOPYRIMIDINE DIHYDROBROMIDE IN THE PRESENCE OF A SOLVENT SELECTED FROM THE CLASS CONSISTING OF SOLVENT OF ACETONITRILE, ACETONE, AND A LOWER ALIPHATIC ALCOHOL AT A TEMPERATURE OF BETWEEN 0* AND 27* C., RECOVERING 1((4- AMINO - 2 - METHYL)-5-PYRIMIDYLMETHYL)-2METHYL-3-(B-HYDROXYETHYL)-5-PYRIDINIUM BROMIDE HYDROBROMIDE THUS FORMED, REACTING THE LATTER COMPOUND WITH PICRIC ACID, RECOVERING THE DIPICRATE OF 1-(4 -AMINO - 2 - METHYL)-5-PYRIMIDYLMETHYL)-2-METHYL-3-(B - HYDROXYETHYL)-PYRIDINE THUS FORMED, REACTING THE LATTER COMPOUND WITH HYDROCHLORIC ACID AND RECOVERING 1-(4-AMINO-2METHYL) -5-PYRIMIDYLMETHYL)-2-METHYL-3-(B-HYDROXYETHYL)-PYRIDINIUM CHLORIDE HYDROCHLORIDE.
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) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |