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Inventor

Ivan Richards

Inventor
Kalamazoo, MI, US

Overview

3→
Patents
2005–2008
Patent span
Chemistry
Primary field (CPC C)

Patents· 3 as inventor

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

A61Pprimary
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations38%
C07DHeterocyclic compounds38%
C07CAcyclic or carbocyclic compounds25%
PatentTitleYear
7,439,397'Phenol derivative'20086,951,950'Quaternary ammonium compounds'20056,890,920'Quaternary ammonium compounds'2005

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2005Patents assigned to UPJOHN CO (2)· patent assignee history
2005–2008Based in Kalamazoo, MI, US· patent location history
2008Patents assigned to PFIZER (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
UPJOHN CO22005
PFIZER12008
Locations
LocationPatentsSpan
Kalamazoo, MI, US32005–2008