Gregory W Alexander

US Patent:

54709423, Nov 28, 1995

Filed:

Feb 16, 1995

Appl. No.:

8/390202

Inventors:

Gregory C. Alexander - University City MO
Mark E. Jason - Chesterfield MO
Dennis J. Kalota - Fenton MO

Assignee:

Monsanto Company - St. Louis MO

International Classification:

C08G 6910

US Classification:

528328

Abstract:

There is disclosed a process for preparing polyaspartic acid by thermal condensation of L-aspartic acid in a novel catalyst which shortens the reaction time and increases the molecular weight of the polymer. The novel catalyst is a catalytically effective methylenephosphonic acid. Typical catalysts are 1-hydroxyethylidene-1,1-diphosphonic acid and aminotris(methylenephosphonic acid). The methylenephosphonic acid is blended with the amino acid in a molar ratio of amino acid to catalyst in the range of from about 1:1 to 40:1.

US Patent:

56338392, May 27, 1997

Filed:

Feb 16, 1996

Appl. No.:

8/602461

Inventors:

Gregory Alexander - Carol Stream IL
David L. Volk - Clairton PA
Steven D. Goldenbogen - Pittsburgh PA

International Classification:

G11B 1722

US Classification:

369 30

Abstract:

A microprocessor acts upon instructions received from a random access memory and a read only memory. A removable hard drive contains musical selections digitally stored thereon. The hard drive stores data in the random access memory and retrieves data from the random access memory as directed by the microprocessor. A monitor displays a list of available musical selections and a list of the customer's selections. A keyboard is used by the customer to provide input to the microprocessor. A card reader retrieves electronic information from a payment card and sends payment information to the microprocessor. A CD writer and dispenser is controlled by the microprocessor to retrieve a blank compact disk from a CD storage, record the customer's musical selections onto the compact disk, and dispense the compact disk.