Herbert B Scher, Age 826512 Pavone St, Lake Worth, FL 33467

6337130, Jan 8, 2002

Jul 29, 1999

09/363571

Juanita Elena Van Koppenhagen - Vallejo CA
Herbert Benson Scher - Moraga CA
Ian Malcolm Shirley - Binfield, GB
Philip Wade - Runcorn, GB
Richard Follows - Astley, GB

Zeneca Limited - London

B32B 1502

42840221, 528230, 528245, 528259, 528 59, 528 61, 528 65, 42840224, 424 7808, 424 7836, 424 7837, 424462, 424489, 424497, 424405, 504116, 504148, 504189

Microcapsules of a microcapsule formed of a polyurea shell wall and an encapsulated ingredient or ingredients enclosed within the wall, the wall comprising at least one oligomeric acetal having the moiety in which R is (a) a moiety containing a chain of from 5 to about 40 optionally substituted carbon atoms, (b) a moiety containing a chain of from 4 to about 40 carbon atoms and one or more internally linked oxygen or sulfur atoms or âNH-groups, or (c) an optionally substituted ethylene or propylene moiety Z is (a) an optionally substituted phenyl group, (b) an optionally substituted C -C alkyl, C -C alkenyl, C -C cycloalkyl or C -C cycloalkenyl group, or (c) benzoyl, and n is 1 if R is (a) or (b), or is 2-20 if R is (c). The microcapsules are acid-sensitive and the capsule walls are relatively readily degraded or disintegrated by contacting the microcapsules with an acidic substance, preferably an organic or inorganic acid whereby the encapsulated ingredient or ingredients are released into the surrounding environment. The invention is particularly suitable for encapsulation of biologically active substances and agrochemicals, and most preferably pesticides for foliar treatment.

6340653, Jan 22, 2002

May 30, 1995

08/453611

Herbert B. Scher - Moraga CA
Marius Rodson - El Sobrante CA

Syngenta Limited - Surrey

A01N 2528

504112, 504342, 504359

Microencapsulated compositions containing haloacetanilide herbicides, i. e. , acetochlor, are produced by microencapsulation process. The microencapsulated composition performs comparably to nonencapsulated compositions of the same herbicide applied at the same application rates.

6358520, Mar 19, 2002

Jul 17, 1998

09/118513

Ray J. Lo - San Leandro CA
Jin L. Chen - El Cerrito CA
Herbert B. Scher - Moraga CA

Syngenta Limited - Surrey

A01N 2528

424408, 424406, 424417, 424418, 424419, 424420, 424421, 424497, 424501, 514531, 42721331, 42721334, 264 41, 264 43, 264 433, 264 47

Solid water-dispersible compositions containing microencapsulated pesticides are produced by spray-drying an aqueous suspension of said pesticides in the presence of a water-soluble polymer, preferably polyvinyl alcohol.

6419942, Jul 16, 2002

May 17, 2000

09/572515

Ray Jia Ruey Lo - Alameda CA
Jin Ling Chen - Randolph NJ
Herbert Benson Scher - Moraga CA
Juanita Elena Van Koppenhagen - Vallejo CA
Ian Malcolm Shirley - Binfield, GB

Syngenta Limited

A01N 2528

424408, 424406, 424419, 424421, 514521, 514531

Solid water-dispersible compositions containing microencapsulated pesticides are produced by spray-drying an aqueous suspension of said pesticides in the presence of a water-soluble polymer, preferably polyvinyl alcohol.

6485736, Nov 26, 2002

Sep 7, 2000

09/656718

Ian Malcolm Shirley - Binfield, GB
Juanita Elena Van Koppenhagen - Vallejo CA
Herbert Benson Scher - Moraga CA
Richard Follows - Greater Manchester, GB
Philip Wade - Cheshire, GB
Fergus Gerard Paul Earley - Highfield, GB
Dianne Beth Shirley - Binfield, GB

Syngenta Ltd. - Surrey

A61F 1300

424424, 504359, 504108, 4272133

A novel microcapsule comprising a liquid core material which is substantially insoluble in water and enclosed within a solid permeable shell of a polymer resin containing disulfide linkages is disclosed. The process for producing such microcapsules is likewise disclosed.

6514439, Feb 4, 2003

Dec 11, 2001

10/013433

Juanita E. Van Koppenhagen - Vallejo CA
Herbert B. Scher - Richmond CA
Ian M. Shirley - Berkshire, GB
Philip Wade - Runcorn, GB
Richard Follows - Blackley, GB

Syngenta Ltd.

B01J 1302

264 41, 528 59, 528 61, 528 65, 528230, 528245, 528259, 264 43, 264 432, 264 433, 264 44

Microcapsules of a microcapsule formed of a polyurea shell wall and an encapsulated ingredient or ingredients enclosed within the wall, the wall comprising at least one oligomeric acetal having the moiety in which R is (a) a moiety containing a chain of from 5 to about 40 optionally substituted carbon atoms, (b) a moiety containing a chain of from 4 to about 40 carbon atoms and one or more internally linked oxygen or sulfur atoms or âNH-groups, or (c) an optionally substituted ethylene or propylene moiety Z is (a) an optionally substituted phenyl group, (b) an optionally substituted C -C alkyl, C -C alkenyl, C -C cycloalkyl or C -C cycloalkenyl group, or (c) benzoyl, and n is 1 if R is (a) or (b), or is 2-20 if R is (c). The microcapsules are acid-sensitive and the capsule walls are relatively readily degraded or disintegrated by contacting the microcapsules with an acidic substance, preferably an organic or inorganic acid whereby the encapsulated ingredient or ingredients are released into the surrounding environment. The invention is particularly suitable for encapsulation of biologically active substances and agrochemicals, and most preferably pesticides for foliar treatment.

6541422, Apr 1, 2003

May 28, 1999

09/321639

Herbert B. Scher - Moraga CA
Jinling Chen - Randolph NJ

Syngenta Limited

A01N 5502

504116, 504191, 504190, 504348, 504349, 504350, 544 64, 544225, 562430, 564 85, 564 86, 564 92, 564 97, 568329, 558412, 558396, 558397, 560 12, 560 21

A method of selectively controlling undesirable vegetation in crops by using a postemergent application of an herbicidally effective amount of a metal chelate of a 2-(substituted benzoyl)-1,3-cyclohexanedione compound to the locus of such undesirable vegetation.

6544540, Apr 8, 2003

Jul 28, 1999

09/363324

Juanita Elena Van Koppenhagen - Vallejo CA
Herbert Benson Scher - Moraga CA
Ian Malcolm Shirley - Binfield, GB
Philip Wade - Runcorn, GB
Richard Follows - Astley, GB

Syngenta Limited

A01N 2528

424408, 424406, 424417, 424418, 424419, 424497, 424DIG 8, 514521, 514531, 264 43, 264 47, 42721333, 42840221

Microcapsules formed from an aminoplast shell wall and an encapsulated ingredient or ingredients enclosed within the wall in which the wall contains a base-cleavable ester moiety. These capsules have been found to be sensitive to the presence of base such that in the presence of base, the capsule walls are relatively quickly disintegrated or degraded so as to produce a relatively quick release of the encapsulated materials. Microcapsules of this invention are particularly suitable for use in controlling insects having an alkaline gut such as certain lepidoptera in that the capsule shell wall may be designed so as to quickly disintegrate under the alkaline conditions present in the gut of the insect thus providing a microcapsule which is safe to handle but which is selectively effective against certain undesirable insects while not harmful to beneficial insects or insects which do not feed on the capsule materials.