Inventor
Erwin Weiss
Inventor
Hofheim, DE
Overview
Patents· 12 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C07Fprimary
C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium50%
C01BNon-metallic elements6%
C01GCompounds containing metals not covered by subclasses c01d or c01f6%
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds6%
C04BLime, magnesia6%
C07CAcyclic or carbocyclic compounds6%
C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds6%
C22BProduction and refining of metals6%
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers6%
Y02PClimate change mitigation technologies in the production or processing of goods6%
PatentTitleYear
8,808,451'Reducing agent for the soluble chromate content of cement and methods for production thereof'20146,673,963'Process for preparing sorbic acid by thermal cleavage'20044,870,689'Ear wax barrier for a hearing aid'19894,847,419'Process for the preparation of bifunctional tertiary aromatic phosphine sulfides, and also several specific representatives of this class of compounds'19894,816,605'Process for the preparation of bifunctional tertiary aromatic phosphine oxides'19894,806,691'Process for the preparation of tertiary phosphine oxides'19894,761,252'Process for the preparation of vinylphosphonic dichloride'19884,761,251'Process for the preparation of vinylphosphonic dichloride'19884,749,524'Process for the preparation of 2-chloroethanephosphonic dichloride'19884,675,446'Process for the preparation of tertiary phosphine oxides'19874,670,601'Process for the preparation of bifunctional tertiary aromatic phosphine sulfides'19874,526,728'2-Acrylamido- and 2-methacrylamido-2-methyl propanephosphonic acids and their salts, process for the preparation thereof, and use thereof for the manufacture of copolymers'1985Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1985–1989Patents assigned to HOECHST AG (8)· patent assignee history
1985Based in Kelkheim, DE· patent location history
1987–2004Based in Hofheim, DE· patent location history
1989Patents assigned to BELTONE ELECTRONICS CORP (1)· patent assignee history
1989Based in Northbrook, IL, US· patent location history
2014Patents assigned to BAHL WERNER (1)· patent assignee history
2014Patents assigned to CRENOX GMBH (1)· patent assignee history
2014Patents assigned to GERHARD AUER (1)· patent assignee history
2014Based in Kriftel, DE· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HOECHST AG | 8 | 1985–1989 |
| BAHL WERNER | 1 | 2014 |
| BELTONE ELECTRONICS CORP | 1 | 1989 |
| CRENOX GMBH | 1 | 2014 |
| GERHARD AUER | 1 | 2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hofheim, DE | 9 | 1987–2004 |
| Kriftel, DE | 1 | 2014 |
| Northbrook, Illinois, US | 1 | 1989 |
| Kelkheim, DE | 1 | 1985 |