Richard R Bretz

US Patent:

53764501, Dec 27, 1994

Filed:

Sep 30, 1992

Appl. No.:

7/953293

Inventors:

Ronald A. Greinke - Medina OH
Richard I. Bretz - Parma OH

Assignee:

UCAR Carbon Technology Corporation - Danbury CT

International Classification:

B32B 516

US Classification:

428402

Abstract:

Particles of intercalated graphite are formed by treating graphite particles with an intercalant and contacting the graphite particles with an organic molecule having C. sub. 8 -C. sub. 30 carbon atoms and a polar end functional group.

US Patent:

55828116, Dec 10, 1996

Filed:

Sep 22, 1995

Appl. No.:

8/532365

Inventors:

Ronald A. Greinke - Medina OH
Richard I. Bretz - Parma OH

Assignee:

UCAR Carbon Technology Corporation - Danbury CT

International Classification:

C01B 3104

US Classification:

423265

Abstract:

A stable blister free flexible graphite is formed in accordance with the present invention by performing two chemical reactions including a first step of high temperature heat treatment which converts the active carbon surface from hydrophilic to hydrophobic and generates active surface sites and a second step of exposing the heat treated graphite to a stabilizing reagent for stabilizing the active sites generated by the first step of high temperature heat treatment.

US Patent:

53726197, Dec 13, 1994

Filed:

Oct 14, 1992

Appl. No.:

7/960811

Inventors:

Ronald A. Greinke - Medina OH
Richard I. Bretz - Parma OH
Joseph T. Mullhaupt - Williamsville NY

Assignee:

Ucar Carbon Technology Corporation - Danbury CT

International Classification:

F17C 1100
B01J 2020
C01B 3110
C01B 3112

US Classification:

481273

Abstract:

A halogenated or sulfonated active carbon which has a high storage capacity for methane is provided from selected halogens in elemental form or solutions of such halogens or from solutions of sulfuric acid, fuming sulfuric acid, sulfur trioxide.