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Inventor

David H. Ellenberger

Inventor
Karns City, PA, US

Overview

5→
Patents
1990–2002
Patent span
Chemistry
Primary field (CPC C)

Patents· 5 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C07Cprimary
C07CAcyclic or carbocyclic compounds60%
C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium40%
PatentTitleYear
6,444,862'Synthesis and isolation of metal alkoxides'20025,886,229'Method of synthesis of alkali metal trisubstituted borohydride reagents'19995,420,322'Preparation of alkali-metal hexamethydisilazanes'19955,078,906'Strong base reagent'19924,910,337'Process for the preparation of .alpha.-arylalkanoic acids'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–2002Patents assigned to MINE SAFETY APPLIANCES CO (5)· patent assignee history
1990–1992Based in Chicora, PA, US· patent location history
1995Based in Fenelton, PA, US· patent location history
1999–2002Based in Karns City, PA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MINE SAFETY APPLIANCES CO51990–2002
Locations
LocationPatentsSpan
Karns City, Pennsylvania, US21999–2002
Chicora, Pennsylvania, US21990–1992
Fenelton, Pennsylvania, US11995