Inventor
Christoph Frey
Inventor
Aesch, CH
Overview
Patents· 11 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C09Bprimary
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments38%
C30BSingle-crystal growth25%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests13%
C03BManufacture, shaping, or supplementary processes6%
G03GElectrography6%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h106%
Y10TTechnical subjects covered by former us classification6%
PatentTitleYear
7,202,146'Process for producing doped semiconductor wafers from silicon, and the wafers produced thereby'20076,946,030'Method for the production of a silica glass crucible with crystalline regions from a porous silica glass green body'20056,843,848'Semiconductor wafer made from silicon and method for producing the semiconductor wafer'20056,350,314'Process for producing nitrogen-doped semiconductor wafers'20024,529,804'Naphthostyril Ni or Cu complexes, a process for their preparation, and high molecular weight organic material pigmented with these metal complexes'19854,191,566'Electrophotographic imaging process using anthraquinoid black pigments or metal complexes'19804,165,319'Isoindoline pigments'19794,097,484'Mixed complexes of methine dyes'19784,065,462'Iminoisoindolinone metal complex'19774,002,635'Isoindolinone compounds useful in preparing heavy metal containing pigments'19773,994,899'Metal complex pigments'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1985Patents assigned to CIBA GEIGY CORP (7)· patent assignee history
1976–1985Based in Aesch, CH· patent location history
1977Based in Oberwil, CH· patent location history
2002Patents assigned to WACKER SILTRONIC HALBLEITERMAT (1)· patent assignee history
2002–2005Based in Burghausen, DE· patent location history
2005–2007Patents assigned to SILTRONIC AG (2)· patent assignee history
2005Patents assigned to WACKER CHEMIE GMBH (1)· patent assignee history
2007Based in Freiberg, DE· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CIBA GEIGY CORP | 7 | 1976–1985 |
| SILTRONIC AG | 2 | 2005–2007 |
| WACKER CHEMIE GMBH | 1 | 2005 |
| WACKER SILTRONIC HALBLEITERMAT | 1 | 2002 |
Locations
| Location | Patents | Span |
|---|---|---|
| Aesch, CH | 6 | 1976–1985 |
| Burghausen, DE | 3 | 2002–2005 |
| Freiberg, DE | 1 | 2007 |
| Oberwil, CH | 1 | 1977 |