Matthew L Iwen

US Patent:

6355323, Mar 12, 2002

Filed:

Jan 27, 2000

Appl. No.:

09/491756

Inventors:

Matthew L. Iwen - Savage MN 55378
Robert A. Christopherson - Rosemont MN 55068
Don Kiser - Lakeville MN 55044
Thomas J. Lundborg - Belle Plaine MN 56011

International Classification:

B32B 304

US Classification:

428 418, 428192, 156 71, 156227, 156291, 427282, 52411, 5250601, 52750

Abstract:

A barrier sheet having a first side and a second side, a top edge, a bottom edge, and a laterally located midpoint, wherein the sheet is folded along its length to form a folded sheet defined by at least one fold with an adhesive strip positioned at a predetermined distance from the top and bottom edges, and preferably approximately at the sheet midpoint. When making a roll of barrier material, a barrier sheet material is provided and folded at least once laterally. The sheet then incorporates an adhesive strip applied to one side of the sheet at a predetermined distance from the top and bottom ends, preferably approximately at the midpoint. The adhesive strip is oriented lengthwise such that when the sheet is unrolled from the roll and unfolded, the strip will approximately bisect the sheet lengthwise. The sheet is then folded in a predetermined fashion, and rolled onto a roll. Further, when applying the barrier material to a structure, a predetermined length of folded sheet is extended and cut from the roll.

US Patent:

6833038, Dec 21, 2004

Filed:

Dec 17, 2001

Appl. No.:

10/023593

Inventors:

Matthew L. Iwen - Savage MN
Robert A. Christopherson - Rosemont MN
Don Kiser - Lakeville MN
Thomas J. Lundborg - Belle Plaine MN

Assignee:

Tyco International (US), Inc. - Exeter NH

International Classification:

B32B 304

US Classification:

156 71, 156227, 156291, 427282

Abstract:

A barrier sheet having a first side and a second side, a top edge, a bottom edge, and a laterally located midpoint, wherein the sheet is folded along its length to form a folded sheet defined by at least one fold with an adhesive strip positioned at a predetermined distance from the top and bottom edges, and preferably approximately at the sheet midpoint. When making a roll of barrier material, a barrier sheet material is provided and folded at least once laterally. The sheet then incorporates an adhesive strip applied to one side of the sheet at a predetermined distance from the top and bottom ends, preferably approximately at the midpoint. The adhesive strip is oriented lengthwise such that when the sheet is unrolled from the roll and unfolded, the strip will approximately bisect the sheet lengthwise. The sheet is then folded in a predetermined fashion, and rolled onto a roll. Further, when applying the barrier material to a structure, a predetermined length of folded sheet is extended and cut from the roll.

US Patent:

20110270363, Nov 3, 2011

Filed:

Apr 25, 2011

Appl. No.:

13/093455

Inventors:

Dana E. Schramm - Woodbury MN, US
Matthew L. Iwen - Savage MN, US
Nick J. Miller - Blaine MN, US
Matthew R. Call - Blaine MN, US

Assignee:

DONATELLE PLASTICS, INC. - New Brighton MN

International Classification:

A61N 1/36
H01P 11/00
H01R 43/00

US Classification:

607 72, 29858, 29600

Abstract:

A header for use in implantable pulse generator devices. The header is cart, of electrical connector assembly having one or more openings designed to receive the terminal pin of an electrical lead wire or electrode. The header is designed to provide and sustain long-term electrical and mechanical lead wire connections between the electrodes of a terminal pin and the implantable pulse generator device.

US Patent:

51420236, Aug 25, 1992

Filed:

Jan 24, 1992

Appl. No.:

7/825059

Inventors:

Patrick R. Gruber - St. Paul MN
Eric S. Hall - Crystal MN
Jeffrey J. Kolstad - Wayazata MN
Matthew L. Iwen - Minneapolis MN
Richard D. Benson - Maple Plain MN
Ronald L. Borchardt - Eden Prairie MN

Assignee:

Cargill, Incorporated - Minnetonka MN

International Classification:

C08G 6308
C07D31912

US Classification:

528354

Abstract:

A process for the continuous production of polylactide polymers from lactic acid which incorporates removal of water or a solvent carrier to concentrate the lactic acid feed followed by polymerization to a low-molecular-weight prepolymer. This prepolymer is fed to a reactor in which a catalyst is added to facilitate generation of lactide, the depolymerization product of polylactic acid. The lactide generated is continuously fed to a distillation system as a liquid or vapor wherein water and other impurities are removed. The resultant purified liquid lactide is fed directly to a polymerization process.

US Patent:

52740730, Dec 28, 1993

Filed:

Aug 24, 1992

Appl. No.:

7/935059

Inventors:

Patrick R. Gruber - St. Paul MN
Eric S. Hall - Crystal MN
Jeffrey J. Kolstad - Wayzata MN
Matthew L. Iwen - Minneapolis MN
Richard D. Benson - Long Lake MN
Ronald L. Borchardt - Eden Prairie MN

Assignee:

Cargill, Incorporated - Minneapolis MN

International Classification:

C08G 6308
C07D31912

US Classification:

528354

Abstract:

A process for the continuous conversion of crude lactic acid to a substantially purified lactide or polylactide including the steps of polymerizing the lactic acid to form a prepolymer with subsequent depolymerization to form a crude lactide in the presence of a catalyst. The crude lactide is purified in an improved distillation system in which at least three fractions are formed with the substantially purified lactide removed as an intermediate boiling sidedraw stream. The substantially purified lactide may then be polymerized.

US Patent:

52584887, Nov 2, 1993

Filed:

Aug 7, 1992

Appl. No.:

7/926901

Inventors:

Patrick R. Gruber - St. Paul MN
Eric S. Hall - Crystal MN
Jeffrey J. Kolstad - Wayzata MN
Matthew L. Iwen - Minneapolis MN
Richard D. Benson - Maple Plain MN
Ronald L. Borchardt - Eden Prairie MN

Assignee:

Cargill, Incorporated - Minneapolis MN

International Classification:

C08G 6308
C07D31912

US Classification:

528354

Abstract:

A process for the continuous production of polylactide polymers from lactic acid which incorporates removal of water or a solvent carrier to concentrate the lactic acid feed followed by polymerization to a low-molecular-weight prepolymer. This prepolymer is fed to a reactor in which a catalyst is added to facilitate generation of lactide, the depolymerization product of polylactic acid. The lactide generated is continuously fed to a distillation system as a liquid or vapor wherein water and other impurities are removed. The resultant purified liquid lactide is fed directly to a polymerization process.

US Patent:

53570359, Oct 18, 1994

Filed:

Sep 16, 1993

Appl. No.:

8/122145

Inventors:

Patrick R. Gruber - St. Paul MN
Eric S. Hall - Crystal MN
Jeffrey J. Kolstad - Wayzata MN
Matthew L. Iwen - Minneapolis MN
Richard D. Benson - Maple Plain MN
Ronald L. Borchardt - Eden Prairie MN

Assignee:

Cargill, Incorporated - Minnetonka MN

International Classification:

C08G 6308
C07D31912

US Classification:

528354

Abstract:

A process for the continuous production of polylactide polymers from lactic acid which incorporates removal of water or a solvent carrier to concentrate the lactic acid feed followed by polymerization to a low-molecular-weight prepolymer. This prepolymer is fed to a reactor in which a catalyst is added to facilitate generation of lactide, the depolymerization product of polylactic acid. The lactide generated is continuously fed to a distillation system as a liquid or vapor wherein water and other impurities are removed. The resultant purified liquid lactide is fed directly to a polymerization process.

US Patent:

63264587, Dec 4, 2001

Filed:

Oct 7, 1993

Appl. No.:

8/133445

Inventors:

Patrick Richard Gruber - St. Paul MN
Eric Stanley Hall - Crystal MN
Jeffrey John Kolstad - Wayzata MN
Matthew Lee Iwen - Richfield MN
Richard Douglas Benson - Long Lake MN
Ronald Leo Borchardt - Eden Prairie MN

Assignee:

Cargill, Inc. - Minneapolis MN

International Classification:

C08G 6308
C08G 6382
C08G 6391
C07D31912

US Classification:

528354

Abstract:

A process for the continuous production of substantially purified lactide and lactide polymers from lactic acid or an ester of lactic acid including the steps of forming crude polylactic acid, preferably in the presence of a catalyst means in the case of the ester of lactic acid, to form a condensation reaction by-product and polylactic acid, and depolymerizing the polylactic acid in a lactide reactor to form crude lactide, followed by subsequent purification of the crude lactide in a distillation system. A purified lactide is then polymerized to form lactide polymers.