Inventor
Friedhelm Geiger
Inventor
Erlensee, DE
Overview
Patents· 14 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C07Cprimary
C07CAcyclic or carbocyclic compounds23%
C01CAmmonia18%
C07DHeterocyclic compounds18%
B01DSeparation14%
A23KFodder9%
C01BNon-metallic elements9%
G05BControl or regulating systems in general5%
H04LTransmission of digital information, e.g. telegraphic communication5%
PatentTitleYear
7,493,524'Network with redundancy properties, a branching unit for a user device in a network, redundancy manager for a network with redundancy properties and method for operating a network with redundancy properties'20095,990,349'Process for the preparation of D,L-methionine or the salt thereof'19995,770,769'Process for the preparation of D,L-methionine or the salt thereof'19984,518,801'Process for the hydrolysis of 5-(.beta.-methylmercaptoethyl)-hydantoin'19854,434,148'Working up of the residual gases resulting from the production of cyanuric chloride'19844,391,987'Process for the production of aqueous sodium methioninate solutions'19834,391,988'Process for the production of aqueous sodium methioninate solutions'19834,239,696'Process for the production of alkyl sulfonic acids'19804,052,445'Process for the production of alkyl sulfonic acids'19774,038,276'Process for the production of finely divided solid cyanuric chloride'19773,961,023'Process for the production of cyanogen chloride and hydrogen chloride'19763,957,950'Process for preparing pure chlorine'19763,949,060'Process for the production of cyanogen chloride'19763,947,552'Process for the purification of cyanogen chloride'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1999Patents assigned to DEGUSSA (10)· patent assignee history
1976–1985Patents assigned to GEIGER FRIEDHELM (3)· patent assignee history
1976–1980Patents assigned to SCHREYER GERD (2)· patent assignee history
1976Patents assigned to HEIMBERGER WERNER (1)· patent assignee history
1976–1980Based in Hanau, DE· patent location history
1976Based in Grossauheim, DT· patent location history
1977–1999Based in Erlensee, DE· patent location history
1985Patents assigned to BOLZE RUDOLF (1)· patent assignee history
2009Based in Spring Gove, PA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| DEGUSSA | 10 | 1976–1999 |
| GEIGER FRIEDHELMself | 3 | 1976–1985 |
| SCHREYER GERD | 2 | 1976–1980 |
| BOLZE RUDOLF | 1 | 1985 |
| HEIMBERGER WERNER | 1 | 1976 |
Locations
| Location | Patents | Span |
|---|---|---|
| Erlensee, DE | 7 | 1977–1999 |
| Hanau, DE | 5 | 1976–1980 |
| Spring Gove, Pennsylvania, US | 1 | 2009 |
| Grossauheim, DT | 1 | 1976 |