Inventor

Ludwig Schieferstein

Inventor

Ratingen, DE

Overview

27→

Patents

1986–2013

Patent span

Chemistry

Primary field (CPC C)

Patents· 27 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

A61Kprimary

A61KPreparations for medical, dental or toiletry purposes10%

A61QSpecific use of cosmetics or similar toiletry preparations10%

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds10%

C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds10%

C09DCoating compositions, e.g. paints, varnishes or lacquers10%

C08LCompositions of macromolecular compounds7%

C09KMaterials for miscellaneous applications, not provided for elsewhere6%

Y02WClimate change mitigation technologies related to wastewater treatment or waste management6%

C08JWorking-up4%

C11DDetergent compositions4%

PatentTitleYear

8,580,287'Oil-based agrochemical compositions with increased viscosity'2013 8,334,357'Thickening agent based on polyurethane'2012 7,318,929'Cosmetic preparations'2008 7,214,730'Dispersant compositions containing glycerol carbonate and polyester-based dispersants'2007 6,365,234'Polymerizable, chromium-free, organic coatings for metal'2002 6,251,849'Cleaning agent for hard surfaces based on cationic polymer soil-release compounds'2001 6,180,705'Polyacrylamide with low molecular weight'2001 6,126,921'Hair treatment formulations containing a water-insoluble polymer having a glass transition temperature of -20.degree. C. to 70.degree. C.'2000 6,025,314'Clear-rinsing agents with cationic polymers'2000 5,959,013'Production of thickening agents in liquid state'1999 5,932,629'Anion-based aqueous printing inks with improved deinkability'1999 5,863,461'Water-in-oil emulsions'1999 5,610,242'Process for modifying polymers'1997 5,501,707'Aqueous dispersions of new amphiphilic co-oligomers for the washing- and cleaning-resistant oiling of leather and skins and their use'1996 5,500,475'Polyurethane-based thickeners'1996 5,358,988'Water-in-oil emulsions'1994 5,286,346'Deinking of wastepaper with quaternized hydroxyethyl cellulose'1994 5,238,533'Flotation process for removing fillers from wastepaper in the presence of polymers and copolymers'1993 5,006,621'Co-polymers of long chain alkyl acrylates with N-containing olefins and their use as flow improvers for crude oils'1991 4,946,471'Adhesion promoter for leather finishing'1990 4,859,721'Adducts of carboxylic acids and isocyanates with epoxides, aqueous dispersions containing these adducts, processes for their preparation and their use in the autophoretic coating of metallic surfaces'1989 4,814,101'Zwitterionic polymers and their use in hair treatment preparations'1989 4,784,789'Liquid aqueous cleaning preparations for hard surfaces'1988 4,772,289'Primer for leather finishes'1988 4,685,931'Acrylate dispersion and its use for thickening hydrogen peroxide preparations'1987 4,650,602'Block-copolymeric polyglycol ethers as solution promoters for oil-soluble perfume oils'1987 4,618,582'Process for producing Xanthomonas biopolymers'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986–2002Patents assigned to HENKEL KGAA (23)· patent assignee history

1986Based in Oberhausen, DE· patent location history

1987Based in Wuppertal, DE· patent location history

1988–2013Based in Ratingen, DE· patent location history

2007–2008Patents assigned to COGNIS DEUTSCHLAND GMBH (2)· patent assignee history

2012–2013Patents assigned to COGNIS IP MAN GMBH (2)· patent assignee history

2012–2013Patents assigned to SCHIEFERSTEIN LUDWIG (2)· patent assignee history

2013Patents assigned to BENE PETER (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HENKEL KGAA	23	1986–2002
COGNIS DEUTSCHLAND GMBH	2	2007–2008
COGNIS IP MAN GMBH	2	2012–2013
SCHIEFERSTEIN LUDWIGself	2	2012–2013
BENE PETER	1	2013

Locations

Location	Patents	Span
Ratingen, DE	24	1988–2013
Wuppertal, DE	2	1987
Oberhausen, DE	1	1986