David C Lang

US Patent:

52308227, Jul 27, 1993

Filed:

Apr 24, 1991

Appl. No.:

7/688691

Inventors:

Ahmed A. Kamel - Valley Cottage NY
David J. Lang - Ossining NY
Paul A. Hanna - Queens Village NY
Robert Gabriel - Ellicott City MD
Richard Theiler - Harrington Park NJ

Assignee:

Lever Brothers Company, Division of Conopco, Inc. - New York NY

International Classification:

C11D 100

US Classification:

25217413

Abstract:

Solid core particles encapsulated in a single coat of paraffin wax, the wax having a melting point of about 40. degree. to about 50. degree. C. and a solids content of from 100 to about 35% at 40. degree. C. and from 0 to about 15% at 50. degree. C. The paraffin coat may comprise 20 to 90% by weight of the particle and may be from 100 to 1,500 microns thick. The coat prolongs the time in which particles encapsulated therewith may remain active in aqueous environments. The encapsulated particle is made by spraying molten wax onto the particles in a fluidized bed. Liquid or powder cleaning compositions, particularly automatic dishwashing liquid detergents, may incorporate 0. 01 to 20% by weight of the composition of the coated wax-encapsulated particles.

US Patent:

55892671, Dec 31, 1996

Filed:

Jul 17, 1995

Appl. No.:

8/459915

Inventors:

Francois Delwel - Dordrecht, NL
David J. Lang - Ossining NY

Assignee:

Lever Brothers Company, Division of Conopco, Inc. - New York NY

International Classification:

B32B 516
C11D 754
A62D 300

US Classification:

428407

Abstract:

A polyvinyl ether and paraffin wax blend is described which is useful as a coating for encapsulates which are stable in an alkaline environment and which exhibit a volume % compressibility of 20. degree. or less at 30. degree. C. The polyvinyl ether material has a formula [C. sub. x H. sub. 2x O]. sub. y.

US Patent:

52002365, Apr 6, 1993

Filed:

Apr 24, 1991

Appl. No.:

7/688692

Inventors:

David J. Lang - Ossining NY
Ahmed A. Kamel - Valley Cottage NY
Paul A. Hanna - Queens Village NY
Robert Gabriel - Ellicott City MD
Richard Theiler - Harrington Park NJ

Assignee:

Lever Brothers Company, Division of Conopco, Inc. - New York NY

International Classification:

B05D 700

US Classification:

427213

Abstract:

Solid core particles encapsulated in a single coat of paraffin wax, the wax having a melting point of about 40. degree. to about 50. degree. C. and a solids content of from 100 to about 35% at 40. degree. C. and from 0 to about 15% at 50. degree. C. The paraffin coat may comprise 20 to 90% by weight of the particle and may be from 100 to 1,500 microns thick. The coat prolongs the time in which particles encapsulated therewith may remain active in aqueous environments. The encapsulated particle is made by spraying molten wax onto the particles in a fluidized bed. Liquid or powder cleaning compositions, particularly automatic dishwashing liquid detergents, may incorporate 0. 01 to 20% by weight of the composition of the coated wax-encapsulated particles.

US Patent:

52581322, Nov 2, 1993

Filed:

Mar 31, 1992

Appl. No.:

7/847141

Inventors:

Ahmed A. Kamel - Valley Cottage NY
David J. Lang - Ossining NY
Paul A. Hanna - Queens Village NY
Robert Gabriel - Cranbury NJ
Richard Theiler - Harrington Park NJ
Alyse S. Goldman - Hoboken NJ

Assignee:

Lever Brothers Company, Division of Conopco, Inc. - New York NY

International Classification:

C11D 3395

US Classification:

252 94

Abstract:

Solid core particles encapsulated in a single coat of paraffin wax, the wax having a melting point of about 40. degree. to about 50. degree. C. and a solids content of from 100 to about 35% at 40. degree. C. and from 0 to about 15% at 50. degree. C. The paraffin coat may comprise 20 to 90% by weight of the particle and may be from 100 to 1,500 microns thick. The coat prolongs the time in which particles encapsulated therewith may remain active in aqueous environments. The encapsulated particle is made by spraying molten wax onto the particles in a fluidized bed. Liquid or powder cleaning compositions, particularly automatic dishwashing liquid detergents, may incorporate 0. 01 to 20% by weight of the composition of the coated wax-encapsulated particles.

US Patent:

54607434, Oct 24, 1995

Filed:

May 9, 1994

Appl. No.:

8/239663

Inventors:

Francois Delwel - Dordrecht, NL
David J. Lang - Ossining NY

Assignee:

Lever Brothers Company, Division of Conopco, Inc. - New York NY

International Classification:

C11D 337
C11D 339
C11D 3395
C11D 3386

US Classification:

25217423

Abstract:

A polyvinyl ether and paraffin wax blend is described which is useful as a coating for encapsulates which are stable in an alkaline environment and which exhibit a volume % compressibility of 20 or less at 30. degree. C. The polyvinyl ether material has a molecular formula [C. sub. x H. sub. 2x O]. sub. y.

US Patent:

58589457, Jan 12, 1999

Filed:

Jun 26, 1996

Appl. No.:

8/672464

Inventors:

David John Lang - Ossining NY
Duane Anthony Raible - Park Ridge NJ
Charles Vincent Sabatino - Bayside NY

Assignee:

Lever Brothers Company, Division of Conopco, Inc. - New York NY

International Classification:

C11D 754
C11D 1706

US Classification:

510224

Abstract:

The invention pertains to granules which incorporate citric acid monohydrate as an exotherm control agent within a peracid containing core. The granules have improved dissolution rates of the peracid in a dishwashing cycle. Compositions containing the granules are also described.