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Inventor

Michael J. Krenek

Inventor
Spring, TX, US

Overview

3→
Patents
1977–1991
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 3 as inventor

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

E21Bprimary
E21BEarth or rock drilling60%
F16LPipes20%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests20%
PatentTitleYear
5,044,672'Metal-to-metal sealing pipe swivel joint'19914,273,472'Apparatus for protecting subsea wells'19814,003,434'Method and apparatus for running, operating, and retrieving subsea well equipment'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1991Patents assigned to FMC CORP (3)· patent assignee history
1977Based in Houston, TX, US· patent location history
1981–1991Based in Spring, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
FMC CORP31977–1991
Locations
LocationPatentsSpan
Spring, Texas, US21981–1991
Houston, Texas, US11977