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Inventor

John M. Spence

Inventor
Pittsford, NY, US

Overview

3→
Patents
1989–1996
Patent span
Physics
Primary field (CPC G)

Patents· 3 as inventor

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

G03Gprimary
G03GElectrography75%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests25%
PatentTitleYear
5,480,757'Two component electrophotographic developers and preparation method'19964,912,009'Toner composition and method of making'19904,814,250'Electrophotographic toner and developer compositions containing dioctylsulfosuccinate and sodium benzoate charge control agents'1989

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–1996Patents assigned to EASTMAN KODAK CO (3)· patent assignee history
1989–1990Based in Pittsford, NY, US· patent location history
1996Based in Mendon, NY, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
EASTMAN KODAK CO31989–1996
Locations
LocationPatentsSpan
Pittsford, New York, US21989–1990
Mendon, New York, US11996