Inventor

Dennis D. Leatherman

Inventor

Pittsburgh, PA, US

Overview

11→

Patents

1989–1992

Patent span

Performing operations

Primary field (CPC B)

Patents· 11 as inventor

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

Y10Tprimary

Y10TTechnical subjects covered by former us classification17%

C08JWorking-up12%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests12%

B29CShaping or joining of plastics10%

B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form10%

B29KIndexing scheme associated with subclasses b29b, b29c or b29d, relating to moulding materials or to materials for moulds, reinforcements, fillers or preformed parts, e.g. inserts7%

A01NPreservation of bodies of humans or animals or plants or parts thereof5%

A41GArtificial flowers5%

A61LMethods or apparatus for sterilising materials or objects in general5%

B41MPrinting, duplicating, marking, or copying processes5%

PatentTitleYear

5,114,438'Abrasive article'1992 5,047,283'Electrically conductive article'1991 5,035,886'Active agent delivery device'1991 5,032,450'Microporous material having a coating of hydrophobic polymer'1991 4,959,208'Active agent delivery device'1990 4,937,115'Bacteria impermeable, gas permeable package'1990 4,927,802'Pressure-sensitive multi-part record unit'1990 4,892,779'Multilayer article of microporous and substantially nonporous materials'1990 4,877,679'Multilayer article of microporous and porous materials'1989 4,861,644'Printed microporous material'1989 4,833,172'Stretched microporous material'1989

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–1992Patents assigned to PPG INDUSTRIES INC (11)· patent assignee history

1989–1992Based in Pittsburgh, PA, US· patent location history

1989Based in Upper St. Clair, PA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
PPG INDUSTRIES INC	11	1989–1992

Locations

Location	Patents	Span
Pittsburgh, Pennsylvania, US	10	1989–1992
Upper St. Clair, Pennsylvania, US	1	1989