Inventor
Steffen Piesch
Inventor
Oberursel, DE
Overview
Patents· 22 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C08Gprimary
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds19%
C07DHeterocyclic compounds13%
D21HPulp compositions13%
Y10TTechnical subjects covered by former us classification12%
C08LCompositions of macromolecular compounds10%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients8%
C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds6%
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments4%
C09KMaterials for miscellaneous applications, not provided for elsewhere4%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%
PatentTitleYear
4,764,570'Sulphonamide derivatives and their preparation and use'19884,535,031'Modified aminoplast, its preparation and its use'19854,507,440'Cross-linkable and cross linked macromolecular compositions wherein cross-linking is by structural bridges of the formula --NR.sup.x --CH.dbd.N--CO-- and their preparation'19854,499,232'Water soluble, crosslinkable polymer compositions, their preparation and use'19854,451,620'Diethanolamine salt of sulphamic acid as a curing accelerator for aminoplast resins'19844,430,494'Melamine resins, a process for their preparation and their use and molding compositions produced from the resins'19844,430,380'Bonded structures of textile materials'1984RE031366'Melamine resin, process for its manufacture and its use for the manufacture of coated wood-based materials and laminates'19834,378,446'Acrylate-modified melamine resin which is stable on storage, its preparation and its use'19834,360,459'Sulphur dyestuffs of the carbazole series'19824,328,326'Melamine resins: process for their manufacture and the compression moulding compositions produced from the melamine resins'19824,320,060'Process for the preparation of derivatives of 3-(4-hydroxy-anilino)carbazole'19824,303,561'Melamine resins: process for their manufacture and the compression moulding compositions produced from the melamine resins'19814,273,669'Latent curing agent for thermosetting aminoplast resins, its manufacture and its use'19814,258,043'Pyrazino-carbazoles, process for the production thereof and pharmaceutical agents'19814,250,282'Melamine resin, process for its manufacture and its use for the manufacture of coated wood-based materials and laminates'19814,185,017'N-substituted .epsilon.-caprolactams'19804,163,835'Preparation of electrolyte-free aminoplast resins'19794,076,662'Modified aminoplast compositions'19784,031,064'Aminoplast curing agents'19773,966,689'Polymers based on N-formyl-N\'-acryloyl-methylenediamines'19763,966,769'Sulfonyl compounds'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1988Patents assigned to CASSELLA FARBWERKE MAINKUR AG (19)· patent assignee history
1976–1988Based in Oberursel, DE· patent location history
1980–1981Patents assigned to CASSELLA AG (2)· patent assignee history
1985Patents assigned to DRESSER IND (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CASSELLA FARBWERKE MAINKUR AG | 19 | 1976–1988 |
| CASSELLA AG | 2 | 1980–1981 |
| DRESSER IND | 2 | 1985 |
Locations
| Location | Patents | Span |
|---|---|---|
| Oberursel, DE | 22 | 1976–1988 |