RANDALL SCOTT NELSON, MA, RC
Student, Health Care in Seattle, WA

6447644, Sep 10, 2002

Oct 10, 2001

09/974382

Raymond R. Seltzer - New City NY
Jean-Pierre Wolf - Courtaman, CH
Cyril Heitner - Pierrefonds, CA
John A. Schmidt - Lile Bizard, CA
Peter F. McGarry - Lile Bizard, CA
Glen T. Cunkle - Stamford CT
Randall B. Nelson - Seattle WA

Ciba Specialty Chemicals Corporation - Tarrytown NY

D21F 1100

162158, 162 70, 162 71, 162 76, 162 77, 162 81, 162160, 162162, 1621646, 1621647, 162165, 162166, 162167

Pulps or papers, especially chemimechanical or thermomechanical pulps or papers, which still contain lignin, have enhanced resistance to yellowing when they contain an effective stabilizing amount of a hindered amine compound which preferably is a nitroxide, a hydroxylamine or an ammonium salt thereof. This performance is often further enhanced by the presence of one or more coadditives selected from the group consisting of the UV absorbers, the polymeric inhibitors, the nitrones, the fluorescent whitening agents, metal chelating agents, sulfur containing stabilizers, metal salts and diene compounds. Combinations of nitroxides, hydroxylamines or their salts, benzotriazole or benzophenone UV absorbers and a metal chelating agent are particularly effective. Selected derivatives of 1-oxyl-2,2,6,6-tetramethylpiperidin-4-ol and selected hydroxylamine salts are novel compounds and are surprisingly effective for this purpose.

6500303, Dec 31, 2002

May 18, 2000

09/573401

Raymond R. Seltzer - New City NY
Jean-Pierre Wolf - Courtaman, CH
Cyril Heitner - Pierrefonds, CA
John A. Schmidt - Lile Bizard, CA
Peter F. McGarry - Lile Bizard, CA
Glen T. Cunkle - Stamford CT
Randall B. Nelson - Seattle WA

Ciba Specialty Chemicals Corporation - Tarrytown NY

D21C 712

162158, 162 70, 162 71, 162 76, 162 77, 162 81, 162160, 162162, 1621646, 1621647, 162165, 162166, 162167

Pulps or papers, especially chemimechanical or thermomechanical pulps or papers, which still contain lignin, have enhanced resistance to yellowing when they contain an effective stabilizing amount of a hindered amine compound which preferably is a nitroxide, a hydroxylamine or an ammonium salt thereof. This performance is often further enhanced by the presence of one or more coadditives selected from the group consisting of the UV absorbers, the polymeric inhibitors, the nitrones, the fluorescent whitening agents, metal chelating agents, sulfur containing stabilizers, metal salts and diene compounds. Combinations of nitroxides, hydroxylamines or their salts, benzotriazole or benzophenone UV absorbers and a metal chelating agent are particularly effective. Selected derivatives of 1-oxyl-2,2,6,6-tetramethyl-piperidin-4-ol and selected hydroxylamine salts are novel compounds and are surprisingly effective for this purpose.

6599326, Jul 29, 2003

Jan 12, 2000

09/481665

Raymond Seltzer - New City NY
David Devore - Nyack NY
Glen T. Cunkle - Stamford CT
Cyril Heitner - Pierrefonds, CA
John A. Schmidt - Lile Bizard, CA
Peter F. McGarry - Lile Bizard, CA
Jean-Pierre Wolf - Courtaman, CH
Randall B. Nelson - Seattle WA

Ciba Specialty Chemicals Corporation - Tarrytown NY

D06L 300

8101, 8107, 8110, 162158, 162100, 162 91, 167 70, 167 71, 167 76, 167 77, 167 81, 167162

Chemical pulps or papers, especially kraft pulps or papers, which may still contain traces of lignin, have enhanced resistance to yellowing when they contain an effective stabilizing amount of a N,N-dialkylhydroxylamine, an ester, amide or thio substituted N,N-dialkylhydroxylamine or N,N-dibenzylhydroxylamine or an amminium salt thereof. This performance is often further enhanced by the presence of one or more coadditives selected from the group consisting of the UV absorbers, the polymeric inhibitors, the nitrones, the fluorescent whitening agents and metal chelating agents. Combinations of hydroxylamines or their salts, benzotriazole or benzophenone UV absorbers and a metal chelating agent are particularly effective. N,N-Diethylhydroxylamine and N,N-dibenzylhydroxylamine and their acid salts are surprisingly effective for this purpose.

6254724, Jul 3, 2001

Jul 20, 1998

9/119567

Raymond R. Seltzer - New City NY
Jean-Pierre Wolf - Courtaman, CH
Cyril Heitner - Pierrefonds, CA
John A. Schmidt - L'ile Bizard, CA
Peter F. McGarry - L'ile Bizard, CA
Glen T. Cunkle - Stamford CT
Randall B. Nelson - Seattle WA

Ciba Specialty Chemicals Corporation - Tarrytown NY

D21C 712

162 70

Pulps or papers, especially chemimechanical or thermomechanical pulps or papers, which still contain lignin, have enhanced resistance to yellowing when they contain an effective stabilizing amount of a hindered amine compound which preferably is a nitroxide, a hydroxylamine or an ammonium salt thereof. This performance is often further enhanced by the presence of one or more coadditives selected from the group consisting of the UV absorbers, the polymeric inhibitors, the nitrones, the fluorescent whitening agents, metal chelating agents, sulfur containing stabilizers, metal salts and diene compounds. Combinations of nitroxides, hydroxylamines or their salts, benzotriazole or benzophenone UV absorbers and a metal chelating agent are particularly effective. Selected derivatives of 1-oxyl-2,2,6,6-tetramethyl-piperidin-4-ol and selected hydroxylamine salts are novel compounds and are surprisingly effective for this purpose.

2002008, Jul 11, 2002

Jan 20, 1999

09/234253

RAYMOND SELTZER - NEW CITY NY, US
DAVID DEVORE - LANGHORN PA, US
GLEN T. CUNKLE - STAMFORD CT, US
CYRIL HEITNER - PIERREFONDS, CA
JOHN A. SCHMIDT - L'ILE BIZARD, CA
PETER F. MCGARRY - L'ILE BIZARD, CA
JEAN-PIERRE WOLF - COURTAMAN, CH
RANDALL B. NELSON - SEATTLE WA, US

D21C003/20, C07D211/36, C07D211/40, C07D211/30, C07D211/54, C07D211/32

162/072000, 546/247000, 546/242000, 427/389900, 427/393000

Pulps or papers, especially chemimechanical or thermomechanical pulps or papers, which still contain lignin, have enhanced resistance to yellowing when they contain an effective stabilizing amount of a N,N-dialkylhydroxylamine, an ester, amide or thio substituted N,N-dialkylhydroxylamine or N,N-dibenzylhydroxylamine or an amminium salt thereof. This performance is often further enhanced by the presence of one or more coadditives selected from the group consisting of the UV absorbers, the polymeric inhibitors, the nitrones, the fluorescent whitening agents and metal chelating agents. Combinations of hydroxylamines or their salts, benzotriazole or benzophenone UV absorbers and a metal chelating agent are particularly effective. N,N-Diethylhydroxylamine and N,N-dibenzylhydroxylamine and their acid salts are surprisingly effective for this purpose.

2002017, Nov 28, 2002

May 7, 2002

10/140531

Raymond Seltzer - New City NY, US
David Devore - Langhorn PA, US
Glen Cunkle - Stamford CT, US
Cyril Heitner - Pierrefonds, CA
John Schmidt - L'ile Bizard, CA
Peter McGarry - L'ile Bizard, CA
Jean-Pierre Wolf - Courtaman, CH
Randall Nelson - Seattle WA, US

D21C001/00, D21F011/00, D21H023/00, C09D004/00, C09J004/00, C08L097/02, C09D197/02, C09J197/02

162/158000, 106/164300

Pulps or papers, especially chemimechanical or thermomechanical pulps or papers, which still contain lignin, have enhanced resistance to yellowing when they contain an effective stabilizing amount of a N,N-dialkylhydroxylamine, an ester, amide or thio item substituted N,N-dialkylhydroxylamine or N,N-dibenzylhydroxylamine or an amminium salt thereof. This performance is often further enhanced by the presence of one or more coadditives selected from the group consisting of the UV absorbers, the polymeric inhibitors, the nitrones, the fluorescent whitening agents and metal chelating agents. Combinations of hydroxylamines or their salts, benzotriazole or benzophenone UV absorbers and a metal chelating agent are particularly effective. N,N-Diethylhydroxylamine and N,N-dibenzylhydroxylamine and their acid salts are surprisingly effective for this purpose.

5902454, May 11, 1999

Dec 13, 1996

8/766909

Randall B. Nelson - Seattle WA

Ciba Specialty Chemicals Corporation - Tarrytown NY

D21H11/00

162158

A process to increase the whiteness of paper made from a lignin-containing pulp is disclosed which comprises adding to an aqueous slurry comprising a lignin-containing pulp, in the paper making step, an effective amount of a chelating agent to decrease the content of salts of iron and other heavy metals to 100 ppm or less by weight, based on the dry weight of the pulp, or adding to said aqueous slurry an effective amount of a fluorescent whitening agent, or both a) and b).