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Inventor

Doris L. Brown

Inventor
Towanda, PA, US

Overview

3→
Patents
1990–2021
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.

B01Jprimary
B01JChemical or physical processes, e.g. catalysis or colloid chemistry33%
C04BLime, magnesia33%
E21BEarth or rock drilling33%
PatentTitleYear
10,907,444Choke system for a downhole valve20215,231,123'Basing cement'19934,915,976'Procedure for controlling powder fluidity'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–1993Patents assigned to GTE PROD CORP (2)· patent assignee history
1990–1993Based in Towanda, PA, US· patent location history
2021Patents assigned to BAKER HUGHES OILFIELD OPERATIONS LLC (1)· patent assignee history
2021Patents assigned to BROWN DONAVAN HOLLAND (1)· patent assignee history
2021Based in Houston, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
GTE PROD CORP21990–1993
BAKER HUGHES OILFIELD OPERATIONS LLC12021
BROWN DONAVAN HOLLANDself12021
Locations
LocationPatentsSpan
Towanda, Pennsylvania, US21990–1993
Houston, Texas, US12021