LexDanaLexDanabeta
Inventor

Roger M. Stark

Inventor
Jefferson Hills, PA, US

Overview

2→
Patents
1993–2021
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.

B01Jprimary
B01JChemical or physical processes, e.g. catalysis or colloid chemistry20%
B22FWorking metallic powder20%
C22CAlloys20%
F04BPositive-displacement machines for liquids20%
F16KValves20%
PatentTitleYear
10,954,938Valve seats and valve assemblies for fluid end applications20215,209,607'Powder feeder apparatus'1993

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1993Patents assigned to AMOCO CORP (1)· patent assignee history
1993Based in Oswego, IL, US· patent location history
2021Patents assigned to KENNAMETAL INC (1)· patent assignee history
2021Based in Jefferson Hills, PA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
AMOCO CORP11993
KENNAMETAL INC12021
Locations
LocationPatentsSpan
Jefferson Hills, Pennsylvania, US12021
Oswego, Illinois, US11993