Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wyeth Holdings LLC
Original Assignee
American Cyanamid Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by American Cyanamid CofiledCriticalAmerican Cyanamid Co
Priority to ES210178ApriorityCriticalpatent/ES210178A1/en
Publication of ES210178A1publicationCriticalpatent/ES210178A1/en
Solid-Sorbent Or Filter-Aiding Compositions
(AREA)
Phenolic Resins Or Amino Resins
(AREA)
Abstract
Process for the preparation of melamine characterized in that urea sulfur dioxide and ammonia are reacted at a temperature beyond 300º to 500º at maximum under superatmospheric pressure and that the melamine formed is isolated according to known methods. (Machine-translation by Google Translate, not legally binding)
ES210178A1953-07-061953-07-06A procedure for the preparation of melamine (Machine-translation by Google Translate, not legally binding)
ExpiredES210178A1
(en)
A procedure for the preparation of an effectively soluble compound, based on teofinyl and 3-aminometilpyridine (Machine-translation by Google Translate, not legally binding)