Inventor

Donald H. Shell

Inventor

Bethany, OK, US

Overview

2→

Patents

1985–1989

Patent span

Performing operations

Primary field (CPC B)

Patents· 2 as inventor

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

B29Cprimary

B29CShaping or joining of plastics18%

B29DProducing particular articles from plastics or from substances in a plastic state18%

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. inserts18%

B29LIndexing scheme associated with subclass b29c, relating to particular articles18%

F16LPipes18%

Y10TTechnical subjects covered by former us classification9%

PatentTitleYear

4,869,766'Method for manufacturing large diameter plastic pipe'1989 4,495,970'Large diameter plastic pipe'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985Patents assigned to THYSSEN BORNEMISZA INC (1)· patent assignee history

1985–1989Based in Bethany, OK, US· patent location history

1989Patents assigned to LAMSON & SESSIONS CO (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
LAMSON & SESSIONS CO	1	1989
THYSSEN BORNEMISZA INC	1	1985

Locations

Location	Patents	Span
Bethany, OK, US	2	1985–1989