JOHN BARRON STALLMAN
Physician Assistant at Canton St, Manchester, NH

6066758, May 23, 2000

Sep 2, 1999

9/388518

Richard P. Woodbury - Amherst NH
John B. Stallman - Amherst NH
George F. Winterson - Lowell MA
Kenneth L. Avery - Merrimack NH

Hampshire Chemical Corp. - Lexington MA

C07C32100

560154

Novel thioglycerol derivatives, processes for their manufacture, and optical materials made from such compounds. The thioglycerol derivatives have high concentrations of sulfur relative to compounds conventionally used for optical materials, and thus exhibit high refractive indices without sacrificing processability.

5763661, Jun 9, 1998

Jan 17, 1997

8/783924

John B. Stallman - Amherst NH

Hampshire Chemical Corp. - Lexington MA

C07C23106

564124

A method of preparing acylated. alpha. -amino carboxylic acid amides directly from amino nitriles in high yield and purity. The method involves acylating the amino nitrile with an acyl halide under Schotten-Baumann conditions, and hydrolyzing the resulting nitrile to the amide. The resulting acylated amino carboxylic acid amide precipitates and can be isolated by filtration in high purity.

5973192, Oct 26, 1999

Nov 26, 1997

8/978759

Richard P. Woodbury - Amherst NH
John B. Stallman - Amherst NH
George F. Winterson - Lowell MA
Kenneth L. Avery - Merrimack NH

Hampshire Chemical Corp. - Lexington MA

C07C32100

560154

Novel thioglycerol derivatives, processes for their manufacture, and optical materials made from such compounds. The thioglycerol derivatives have high concentrations of sulfur relative to compounds conventionally used for optical materials, and thus exhibit high refractive indices without sacrificing processability.