Inventor

Fritz Engelhardt

Inventor

Frankfurt am Main, DE

Overview

35→

Patents

1979–2003

Patent span

Chemistry

Primary field (CPC C)

Patents· 35 as inventor

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

C08Fprimary

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds20%

A61LMethods or apparatus for sterilising materials or objects in general17%

C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds7%

C08JWorking-up7%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%

B01JChemical or physical processes, e.g. catalysis or colloid chemistry5%

C07CAcyclic or carbocyclic compounds5%

Y10TTechnical subjects covered by former us classification5%

D06MTreatment, not provided for elsewhere in class d06, of fibres, threads, yarns, fabrics, feathers or fibrous goods made from such materials4%

D06PDyeing or printing textiles4%

PatentTitleYear

6,657,015'Method for the secondary cross-linking of hydrogels with 2-oxotetrahydro-1,3-oxazines'2003 6,565,768'Method for producing water-swellable hydorphilic polymers, said polymers and use thereof'2003 6,559,239'Method for the secondary cross-linking of hydrogels with N-acyl-2-oxazolidinones'2003 6,503,979'Method for cross-linking hydrogels with bis- and poly-2-oxazolidinones'2003 6,472,478'Process for crosslinking hydrogels with bis- and poly-2- oxazolidinones'2002 6,417,425'Absorbent article and process for preparing an absorbent article'2002 6,297,335'Crosslinked, hydrophilic, highly swellable hydrogels, production thereof and use thereof'2001 6,150,477'Process for the preparation of hydrophilic hydrogels of high swelling capacity'2000 6,107,432'Water-swellable, hydrophilic polymer compositions'2000 5,945,495'Use of surfactants in the drying of hydrophilic highly swellable hydrogels'1999 5,840,321'Hydrophilic, highly swellable hydrogels'1998 5,792,880'Process for the preparation of N-lauroyl-L-glutamic acid di-n-butylamide'1998 5,731,365'Hydrophilic, highly swellable hydrogels'1998 5,726,331'Dimethyl n-lauroyl-l-glutamate'1998 5,684,104'Water-swellable hydrophilic polymers'1997 5,668,236'Hydrophilic highly swellable hydrogels'1997 5,594,083'Water-swellable hydrophilic polymers'1997 5,571,764'Absorbent for water and aqueous solutions'1996 5,530,093'Polycondensates containing phosphinic and phosphonic acid groups'1996 5,523,471'Process for the preparation of ether-sulphonates'1996 5,510,436'Water-soluble copolymers useful in drilling fluids'1996 5,502,231'Process for the preparation of cyclic vinylphosphonic esters'1996 5,492,995'Polycondensates containing phosphinic or phosphonic acid groups and siloxane groups'1996 5,488,123'Polycondensates containing polysiloxane groups'1996 5,276,247'Process for obtaining the hydrocarbon from a hydrocarbon-rich gel'1994 5,276,248'Process for the storage and transportation of liquid hydrocarbons'1994 5,274,048'Use of glycidyl phosphonates as crosslinkers in the preparation of hydrogels'1993 5,258,448'Absorbent polymers, manufacturing process and their use in particular for sanitary articles'1993 4,877,540'Methylolated and optionally etherified urethanes containing fluoroalkyl ligands'1989 4,828,570'Tanning agent and a process for its preparation'1989 4,753,999'Copolymer, process for its preparation, and its use'1988 4,588,413'Process for producing dyeings with reactive dyestuffs'1986 4,576,973'Copolymer, process for its preparation and its use as a sorbent'1986 4,552,905'Copolymer, a process for its preparation and its use as a sorbent'1985 4,168,145'Branched low molecular weight polyesters levelling agents for dyestuff'1979

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1979–1997Patents assigned to CASSELLA FARBWERKE MAINKUR AG (14)· patent assignee history

1979–2002Based in Frankfurt am Main, DE· patent location history

1993–1996Patents assigned to CASSELLA AG (2)· patent assignee history

1996–2000Patents assigned to HOECHST AG (7)· patent assignee history

1998–2003Based in Chesapeake, VA, US· patent location history

1999–2002Patents assigned to BASF CORP (2)· patent assignee history

2000–2003Patents assigned to BASF AG (7)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
CASSELLA FARBWERKE MAINKUR AG	14	1979–1997
BASF AG	7	2000–2003
HOECHST AG	7	1996–2000
BASF CORP	2	1999–2002
CASSELLA AG	2	1993–1996

Locations

Location	Patents	Span
Frankfurt am Main, DE	24	1979–2002
Chesapeake, Virginia, US	11	1998–2003