Timothy C Duzick

US Patent:

20020074798, Jun 20, 2002

Filed:

Dec 14, 2000

Appl. No.:

09/736713

Inventors:

Timothy Duzick - Hockessin DE, US
Thomas Lucier - Mebane NE, US

International Classification:

F16L017/00

US Classification:

285/379000

Abstract:

The present invention is directed to a seal assembly for use in sealing a joint between grooved pipe joint ferrules and in particular to a sanitary seal assembly. The seal assembly has an annular retaining part that has a seal cavity and an elastomeric seal shaped to fit within the cavity and is positioned by the cavity. The elastomeric seal and the pipe joint made with the seal assembly are also considered part of this invention.

US Patent:

61275859, Oct 3, 2000

Filed:

May 27, 1998

Appl. No.:

9/077267

Inventors:

Timothy C. Duzick - Hockessin DE
Velliyur Nott Mallikarjuna Rao - Wilmington DE
Munirpallam A. Subramanian - Kennett Square PA

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

C07C 1908
C07C 2118
B01T 27138
B01T 27132

US Classification:

570124

Abstract:

Processes are disclosed for decreasing the chlorine to carbon ratio for halogenated hydrocarbons containing chlorine and from 1 to 6 carbon atoms, in the presence of a multiphase catalyst. The processes each involve (1) preparing a single phase solid catalyst precursor which has a structure that collapses at a temperature of about 400. degree. C. or less and has the formula (NH. sub. 3). sub. 6 Ru. sub. l-r-s Co. sub. r Cr. sub. s MF. sub. 6, where r+s is in the range of 0. 00 to 0. 99, and M is at least one trivalent metal selected from the group consisting of Al, Cr, Fe, V, Sc and Ga; and (2) producing the multiphase catalyst by heating the single phase solid catalyst precursor to about 400. degree. C. or less in an non-oxidizing atomsphere to produce a multiphase composition wherein a phase containing ruthenium is homogeneously dispersed with a phase containing metal fluoride. Also disclosed are single phase fluoride compositions having the formula (NH. sub. 3). sub. 6 Ru. sub. l-r-s Co. sub. r Cr. sub. s MF. sub.