Inventor
Heinz Spahni
Inventor
Frenkendorf, CH
Overview
Patents· 13 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. pigments18%
G03CPhotosensitive materials for photographic purposes14%
G11BInformation storage based on relative movement between record carrier and transducer12%
C07CAcyclic or carbocyclic compounds10%
C09KMaterials for miscellaneous applications, not provided for elsewhere10%
C07DHeterocyclic compounds8%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests6%
Y10TTechnical subjects covered by former us classification6%
G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices4%
B41MPrinting, duplicating, marking, or copying processes2%
PatentTitleYear
7,378,221'Metallocenyl phthalocyanines as optical recording media'20087,034,148'Metallocenyl phthalocyanines as optical recording media'20066,849,315'Fast-writable and precision-writable high-capacity optical storage media'20056,245,403'Writable and erasable high-density optical storage media'20015,641,879'Phthalocyanines substituted by phosphorus-containing groups'19975,407,885'Photochromic naphthacenequinones, process for their preparation and the use thereof'19955,300,663'Photochromic naphthacenequinones, process for their preparation and the use thereof'19945,225,525'Photochromic benzothioxanthone oxides, process for their preparation and the use thereof'19935,208,354'Photochromic naphthacenequinones, process for their preparation and the use thereof'19935,206,395'Photochromic naphthacenequinones, process for their preparation and the use thereof'19935,177,218'Photochromic benzothioxanthone oxides, process for their preparation and the use thereof'19935,177,227'Photochromic naphthacenequinones, process for their preparation and the use thereof'19935,116,674'Composite structure'1992Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1992–1997Patents assigned to CIBA GEIGY CORP (9)· patent assignee history
1992–2008Based in Frenkendorf, CH· patent location history
2001–2008Patents assigned to CIBA SC HOLDING AG (4)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CIBA GEIGY CORP | 9 | 1992–1997 |
| CIBA SC HOLDING AG | 4 | 2001–2008 |
Locations
| Location | Patents | Span |
|---|---|---|
| Frenkendorf, CH | 13 | 1992–2008 |