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Inventor

Merle L. Bell

Inventor
New Waverly, TX, US

Overview

7→
Patents
1988–2003
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 7 as inventor

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

E21Bprimary
E21BEarth or rock drilling64%
F16JPistons18%
Y10TTechnical subjects covered by former us classification18%
PatentTitleYear
6,598,672'Anti-extrusion device for downhole applications'20036,318,729'Seal assembly with thermal expansion restricter'20016,173,964'Seal assembly with backup elements having coil springs positioned therein'20015,603,511'Expandable seal assembly with anti-extrusion backup'19974,953,622'Subterranean well casing float tool'19904,872,510'Subterranean well casing float tool'19894,745,972'Well packer having extrusion preventing rings'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988Patents assigned to HUGHES TOOL CO (1)· patent assignee history
1988–1997Based in New Waverly, TX, US· patent location history
1989–1990Patents assigned to BAKER HUGHES INC (2)· patent assignee history
1997–2003Patents assigned to GREENE TWEED INC (4)· patent assignee history
2001–2003Based in Willis, TX, US· patent location history
2001Based in Spring, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
GREENE TWEED INC41997–2003
BAKER HUGHES INC21989–1990
HUGHES TOOL CO11988
Locations
LocationPatentsSpan
New Waverly, Texas, US41988–1997
Willis, Texas, US22001–2003
Spring, Texas, US12001