Inventor
Karl W. Seper
Inventor
Youngstown, NY, US
Overview
Patents· 6 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C07Cprimary
C07CAcyclic or carbocyclic compounds33%
B22FWorking metallic powder11%
C01DCompounds of alkali metals, i.e. lithium, sodium, potassium, rubidium, caesium, or francium11%
C01GCompounds containing metals not covered by subclasses c01d or c01f11%
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds11%
C07DHeterocyclic compounds11%
C22BProduction and refining of metals11%
PatentTitleYear
5,441,669'Preventing potassium bicarbonate from caking'19955,322,954'Synthesis of 4-substituted phthalic anhydrides'19945,300,201'Photochlorination of phthalic anhydride'19945,215,727'Method of making chromic oxide'19935,206,391'Process for the preparation of halophthalic anhydrides'19935,196,593'Halogenated trifluoromethylbenzenes'1993Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1993–1994Patents assigned to OCCIDENTAL CHEM CO (5)· patent assignee history
1993–1995Based in Youngstown, NY, US· patent location history
1993Based in Grand Island, NY, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| OCCIDENTAL CHEM CO | 5 | 1993–1994 |
Locations
| Location | Patents | Span |
|---|---|---|
| Youngstown, New York, US | 5 | 1993–1995 |
| Grand Island, New York, US | 1 | 1993 |