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Inventor

David A. Aston

Inventor
Oakville, CA

Overview

4→
Patents
1989–2005
Patent span
Textiles
Primary field (CPC D)

Patents· 4 as inventor

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

D21Hprimary
D21HPulp compositions29%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests29%
C09DCoating compositions, e.g. paints, varnishes or lacquers14%
C23GCleaning or de-greasing of metallic material by chemical methods other than electrolysis14%
D21FPaper-making machines14%
PatentTitleYear
6,923,873'Paint stripping composition and method of using the same'20055,246,548'Pitch control'19934,995,944'Controlling deposits on paper machine felts using cationic polymer and cationic surfactant mixture'19914,810,405'Rust removal and composition thereof'1989

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–1993Patents assigned to DEARBORN CHEMICALS CO (2)· patent assignee history
1989–1993Based in Oakville, CA· patent location history
1991Patents assigned to DEARBORN CHEMICAL COMPANY LTD (1)· patent assignee history
1991Based in Ontario, CA· patent location history
2005Patents assigned to GREENSOLV ENVIRONMENTAL PRODUC (1)· patent assignee history
2005Based in Montreal, CA· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DEARBORN CHEMICALS CO21989–1993
DEARBORN CHEMICAL COMPANY LTD11991
GREENSOLV ENVIRONMENTAL PRODUC12005
Locations
LocationPatentsSpan
Oakville, CA21989–1993
Montreal, CA12005
Ontario, CA11991