Patents by Inventor Mario Chiappafreddo

Mario Chiappafreddo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for producing calcium-urea nitrate
    Patent number: 4874595
    Abstract: Calcium-urea nitrate [Ca(NO.sub.3).sub.2.4CO(NH.sub.2).sub.2 ] is produced by means of a process, according to which:a liquid composition is prepared, at a temperature not higher than 170.degree. C., which contains urea and calcium nitrate, in a molar ratio to each other equal to, or approximately equal to, 4/1, and having a water content comprised within the range of from 0 to 15% by weight;said liquid composition is sprayed, through a spray nozzle, on previously formed solid particles of calcium-urea nitrate, kept moving at a temperature comprised within the range of from 40.degree. to approximately 100.degree. C., and under a stream of an inert gas;calcium-urea nitrate is recovered from said solid products from the spray.The so obtained calcium-urea nitrate is in the form of a granular and free-flowing solid, free from the tendency to form dusts, and is useful in agriculture as a nitrogenous fertilizer.
    Type: Grant
    Filed: February 5, 1988
    Date of Patent: October 17, 1989
    Assignees: Enichem Agricoltura S.p.A., CCM S.r.l., Tecnocentro S.r.l.
    Inventors: Antonio Crispoldi, Andrea Moriconi, Mario Chiappafreddo