David A Townsend

US Patent:

6836676, Dec 28, 2004

Filed:

Nov 2, 2001

Appl. No.:

10/003153

Inventors:

Grant Harries Lloyd - Lawrenceville GA
Charles S. Baxter - Lawrenceville GA
Paul James Faerber - Lawrenceville GA
David Townsend - Village of Lakewood IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04M 100

US Classification:

4555691, 4555561, 4555751, 455 903, 37942001, 37942004

Abstract:

This invention includes a speakerphone accessory suitable for connection to either a battery charger having a phone in its pocket or to a cellular telephone. The speakerphone module includes a hemispherical upper housing. The upper housing includes a circular dimple aperture and a wave directing cap. The hemispherical shape, aperture and cap all contribute to directing acoustic waved generated by a speaker disposed within the housing radially from the module in all directions. One embodiment of the module includes a second terminal for passing data and power through the module, allowing the module to be coupled serially between devices. The module also includes a bottom housing having a generally hemispherical shape. The bottom housing provides stability to the connection between the module and a peripheral device in that it reduces the mechanical advantage given to forces incident upon the upper housing acting upon the main terminal.

US Patent:

7119148, Oct 10, 2006

Filed:

Feb 25, 2004

Appl. No.:

10/785403

Inventors:

Cornel Hagiopol - Lilburn GA, US
Yuping Luo - Duluth GA, US
David F. Townsend - Loganville GA, US
Karla D. Favors - Atlanta GA, US
James W. Johnston - Suwanee GA, US
Clay E. Ringold - Decatur GA, US
Lakeisha D. Saddler - Smyrna GA, US
Donald G. Jenkins - Duluth GA, US

Assignee:

Georgia-Pacific Resins, Inc. - Atlanta GA

International Classification:

C08F 8/10

US Classification:

5253271, 5253282, 5253283, 5253294, 525383

Abstract:

A method for making a storage-stable glyoxalated polyacrylamide composition suitable for use as a strengthening agent for paper in which the glyoxal is added to the base polyacrylamide polymer in two portions and a scavenger for aldehyde groups is used.

US Patent:

D570773, Jun 10, 2008

Filed:

Nov 12, 2007

Appl. No.:

29/297476

Inventors:

Grant H. Lloyd - Lawrenceville GA, US
David P. Townsend - Village of Lakewood IL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

1302

US Classification:

D13110

US Patent:

7488403, Feb 10, 2009

Filed:

Aug 17, 2004

Appl. No.:

10/919488

Inventors:

Cornel Hagiopol - Lilburn GA, US
Yuping Luo - Duluth GA, US
David F. Townsend - Grayson GA, US
James W. Johnston - Suwanee GA, US
Clay E. Ringold - Decatur GA, US
Karla D. Favors - Atlanta GA, US

International Classification:

D21H 17/55
C08F 8/00

US Classification:

1621683, 162158, 1621643, 162166, 5253283, 5253294, 525383

Abstract:

Compositions comprising a blend of two or more paper strengthening agents have improved stability compared with previously known paper strengthening agents. One component is a polymeric paper strengthening agent, preferably a wet strengthening agent. The other component is a stabilized glyoxalated polyacrylamide prepared by (1) reacting a first portion of glyoxal with a polyacrylamide having pendant amide groups to form a first reaction mixture comprising glyoxalated polyacrylamide; (2) adding an acid to the first reaction mixture to form a second reaction mixture having a reduced pH and comprising the glyoxalated polyacrylamide; and (3) adding a second portion of glyoxal to the second reaction mixture to form the stabilized glyoxalated polyacrylamide. If desired, an aldehyde scavenger can be included in one or more of step (1), step (2), step (3), or the stabilized glyoxalated polyacrylamide. Such compositions can be used to enhance the strength of paper, particularly the wet strength of paper.

US Patent:

7589153, Sep 15, 2009

Filed:

May 25, 2005

Appl. No.:

11/136730

Inventors:

Cornel Hagiopol - Lilburn GA, US
Yuping Luo - Duluth GA, US
David F. Townsend - Grayson GA, US
Clay E. Ringold - Decatur GA, US
Karla D. Favors - Atlanta GA, US

Assignee:

Georgia-Pacific Chemicals LLC - Atlanta GA

International Classification:

C08F 8/00

US Classification:

525194, 525191, 525192, 525218, 162166, 1621683, 1621646

Abstract:

A method for making storage-stable glyoxalated inter-copolymers with higher and adjustable charge density suitable for use as a strengthening agent for paper. The glyoxalated inter-copolymers can be used to enhance the strength of paper, particularly recycled paper and mechanical printing paper.

US Patent:

7863395, Jan 4, 2011

Filed:

Dec 20, 2006

Appl. No.:

11/613758

Inventors:

Cornel Hagiopol - Lilburn GA, US
Yuping Luo - Duluth GA, US
David F. Townsend - Loganville GA, US
James W. Johnston - Suwanee GA, US

Assignee:

Georgia-Pacific Chemicals LLC - Atlanta GA

International Classification:

C08F 220/56

US Classification:

526220, 526217, 5263031, 5263073, 526310, 526312, 5253294

Abstract:

A method for preparing a cationic polyacrylamide composition particularly suitable for making a glyoxylated polyacrylamide composition useful as a temporary wet-strengthening agent and the composition resulting from that method, along with the use of the composition for adding temporary wet strength to paper and the resulting strengthened paper products.

US Patent:

7897013, Mar 1, 2011

Filed:

Nov 21, 2008

Appl. No.:

12/275619

Inventors:

Cornel Hagiopol - Lilburn GA, US
Yuping Luo - Duluth GA, US
David F. Townsend - Grayson GA, US
James W. Johnston - Suwanee GA, US
Clay E. Ringold - Decatur GA, US
Karla D. Favors - Atlanta GA, US

Assignee:

Georgia-Pacific Chemicals LLC - Atlanta GA

International Classification:

D21H 17/55
C08F 8/00
D21H 21/20

US Classification:

162166, 162158, 1621643, 1621683, 5253282, 5253294, 525383

Abstract:

Compositions comprising a blend of two or more paper strengthening agents have improved stability compared with previously known paper strengthening agents. One component is a polymeric paper strengthening agent, preferably a wet strengthening agent. The other component is a stabilized polyacrylamide prepared by (1) reacting a first portion of glyoxal with a polyacrylamide having pendant amide groups to form a first reaction mixture comprising polyacrylamide; (2) adding an acid to the first reaction mixture to form a second reaction mixture having a reduced pH and comprising the polyacrylamide; and (3) adding a second portion of glyoxal to the second reaction mixture to form the stabilized polyacrylamide. If desired, an aldehyde scavenger can be included in one or more of step (1), step (2), step (3), or the stabilized polyacrylamide. Such compositions can be used to enhance the strength of paper, particularly the wet strength of paper.

US Patent:

8246781, Aug 21, 2012

Filed:

Mar 1, 2011

Appl. No.:

13/037681

Inventors:

Clay E. Ringold - Decatur GA, US
Karla D. Favors - Atlanta GA, US
Dexter C. Johnson - Stone Mountain GA, US
David F. Townsend - Grayson GA, US
Thomas L. Wright - Oxford GA, US
Cornel Hagiopol - Lilburn GA, US

Assignee:

Georgia-Pacific Chemicals LLC - Atlanta GA

International Classification:

B31F 1/12

US Classification:

162111

Abstract:

A creping adhesive comprising a PAE composition comprising a reactive, light crosslinked polyamidoamine-epichlorohydrin polymer (PAE-type polymer) optionally in combination with a reactive modifier and the corresponding method for of creping cellulosic fiber webs with the adhesive.