David M Snider

US Patent:

45424535, Sep 17, 1985

Filed:

Feb 19, 1982

Appl. No.:

6/350513

Inventors:

Michael J. Patrick - Houston TX
David M. Snider - Cary NC

Assignee:

Texas Instruments Incorporated - Dallas TX
IBM Corp. - Dallas TX

International Classification:

G06F 900
G06F 700

US Classification:

364200

Abstract:

A single-chip microcomputer device contains on-chip program storage in a read-only memory (ROM), and this program may be corrected or updated by patching. The ROM addresses are applied to an off-chip memory device containing one bit for each potential ROM address, and each bit is set to mark the beginning address of code to be patched; an interrupt is signalled when one of these set bits is accessed by an address occurring during operation of the microcomputer. The interrupt causes the processor to branch to an off-chip program memory to insert the patch code. The patch ends in a branch back to the on-chip ROM.

US Patent:

20140364528, Dec 11, 2014

Filed:

Dec 13, 2011

Appl. No.:

13/880898

Inventors:

Eric M. Rexrode - Missouri City TX, US
David E. Snider - Jasper GA, US
Woo-Sung Bae - Midland MI, US
Mikhail Y. Gelfer - Sugarland TX, US
Jorge Jimenez - Lake Jackson TX, US

Assignee:

DOW GLOBAL TECHNOLOGIES LLC - Midland MI

International Classification:

C08G 18/48
C08G 18/76
C08G 18/08
C08G 63/668

US Classification:

521177, 528301, 525437

Abstract:

A polyol formulation comprising certain type of polyester polyols useful in the preparation of rigid polyurethane foams having low surface friability is provided. In one embodiment, a reaction system for production of a rigid foam is provided. The reaction system comprises a polyester polyol and one or more polyisocyanates, wherein the polyester polyol and the polyisocyanates are mixed in amounts sufficient to provide a rigid polyurethane foam. The polyester polyol comprises the reaction product of from 20 to 60 weight percent of an aromatic component comprising at least 80 mole percent or greater of terephthalic acid, from 20 to 60 weight percent of a polyethylene glycol having a number average molecular weight from 150 to 1,000, from 5 to 20 weight percent of a glycol having a functionality of 2 and molecular weight of 60 to 250 and from 5 to 20 weight percent of a glycol having a functionality of at least 3 and a molecular weight of 60 to 250.