Inventor

William I. Frey

Inventor

Curtisville, PA, US

Overview

3→

Patents

1976–1981

Patent span

Performing operations

Primary field (CPC B)

Patents· 3 as inventor

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

B29Cprimary

B29CShaping or joining of plastics29%

B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form29%

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. inserts14%

C03BManufacture, shaping, or supplementary processes14%

Y10TTechnical subjects covered by former us classification14%

PatentTitleYear

4,277,299'Release molds for laminating bilayer safety glass'1981 4,274,856'Method for developing a release surface on a glass mold'1981 3,971,864'Polyurethane laminates'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1981Patents assigned to PPG INDUSTRIES INC (3)· patent assignee history

1976–1981Based in Curtisville, PA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
PPG INDUSTRIES INC	3	1976–1981

Locations

Location	Patents	Span
Curtisville, Pennsylvania, US	3	1976–1981