Harry Paul Leftin

45685320, Feb 4, 1986

Oct 16, 1984

6/661482

Gereld S. Benner - Katy TX
Joseph R. Le Blanc - Houston TX
Jing M. Lee - Stafford TX
Harry P. Leftin - Houston TX
Philip J. Shires - Katy TX
Christiaan P. van Dijk - Houston TX

The M. W. Kellogg Company - Houston TX

C01C 104

423361

Ammonia synthesis gas is partially converted over iron-based synthesis catalyst, cooled, and further converted over a more active synthesis catalyst.

41760450, Nov 27, 1979

Jul 10, 1978

5/923519

Harry P. Leftin - Houston TX
David S. Newsome - Houston TX

Pullman Incorporated - Chicago IL

C10G 916
C07C 1104

208 48R

In the production of lower olefins by steam cracking normally liquid hydrocarbons at very short residence times, the formation of coke deposits in cracking furnace tubes is minimized by the addition of a low-coking hydrocarbon to fresh feed having a high coking tendency.

45393109, Sep 3, 1985

May 30, 1984

6/615337

Harry P. Leftin - Houston TX
Kashinath Z. Patil - Houston TX

The M. W. Kellogg Company - Houston TX

B01J 2106
B01J 2310
B01J 2374

502303

Hydrocarbon feedstocks including those containing sulfur are steam reformed in the presence of a catalyst which in the unreduced condition contains nickel oxide, rare earth metal oxide, and zirconium oxide.

60834692, Jul 4, 2000

Apr 10, 1998

9/058453

Harry Paul Leftin - Margate FL

C01B 3102

423445B

Solid fullerite, comprising a mixture of C. sub. 60 and C. sub. 70 fullerenes and higher molecular weight carbon nanotropes, is produced by high temperature, short residence time, pyrolysis of a mixture of hydrocarbons, containing at least two "but less than six" carbon atoms in their molecular structures, admixed with an inert gas comprising at least one member of the Group VIII-A elements of The Periodic Table of The Elements in a substantially reduced-metals free reactor comprised of a thermally stable ceramic or pyrolytic graphite.