Inventor

Joseph F. Donovan

Inventor

Spring, TX, US

Overview

21→

Patents

1983–2001

Patent span

Fixed constructions

Primary field (CPC E)

Patents· 21 as inventor

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

E21Bprimary

E21BEarth or rock drilling70%

B04BCentrifuges7%

F42DBlasting7%

C09KMaterials for miscellaneous applications, not provided for elsewhere3%

F04BPositive-displacement machines for liquids3%

F04DNon-positive-displacement pumps3%

G01NInvestigating or analysing materials by determining their chemical or physical properties3%

Y10TTechnical subjects covered by former us classification3%

PatentTitleYear

6,279,658'Method of forming and servicing wellbores from a main wellbore'2001 6,167,965'Electrical submersible pump and methods for enhanced utilization of electrical submersible pumps in the completion and production of wellbores'2001 5,868,210'Multi-lateral wellbore systems and methods for forming same'1999 5,762,149'Method and apparatus for well bore construction'1998 5,662,170'Method of drilling and completing wells'1997 5,327,974'Method and apparatus for removing debris from a wellbore'1994 RE034451'Perforating gun with auger'1993 5,150,753'Gravel pack screen having retention mesh support and fluid permeable particulate solids'1992 5,115,864'Gravel pack screen having retention means and fluid permeable particulate solids'1992 5,113,941'Surface sand detection monitoring device and method'1992 5,076,355'Perforating gun with auger'1991 5,050,678'Gravel pack screen having retention means and fluid permeable particulate solids'1991 5,016,716'Tubing carried perforating gun with insulation jacket'1991 4,917,183'Gravel pack screen having retention mesh support and fluid permeable particulate solids'1990 4,915,172'Method for completing a non-vertical portion of a subterranean well bore'1990 4,856,591'Method and apparatus for completing a non-vertical portion of a subterranean well bore'1989 4,747,201'Boosterless perforating gun'1988 4,708,200'Apparatus for maintaining clean fluid in a chamber in a subterranean well tool'1987 4,667,735'Fluid pressure activated firing head for providing clean fluid'1987 4,635,734'Boosterless perforating gun and method of assembly'1987 4,401,158'One trip multi-zone gravel packing apparatus'1983

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1983Patents assigned to BAKER INT CORP (1)· patent assignee history

1983–1988Based in Tomball, TX, US· patent location history

1987–1988Patents assigned to BAKER OIL TOOLS INC (4)· patent assignee history

1987–2001Based in Spring, TX, US· patent location history

1989–2001Patents assigned to BAKER HUGHES INC (16)· patent assignee history

1993Based in Houston, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
BAKER HUGHES INC	16	1989–2001
BAKER OIL TOOLS INC	4	1987–1988
BAKER INT CORP	1	1983

Locations

Location	Patents	Span
Spring, Texas, US	17	1987–2001
Tomball, Texas, US	3	1983–1988
Houston, Texas, US	1	1993