LexDanaLexDanabeta
Inventor

Anton J. Dach, Jr.

Inventor
Trinity, TX, US

Overview

7→
Patents
1990–2011
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 drilling56%
F16KValves22%
F16JPistons11%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests11%
PatentTitleYear
7,975,983'System, method and apparatus for split gate valve with mechanically isolated seal surfaces'20117,909,105'Independent wellhead drilling adapter'20117,559,366'Flex-lock metal seal system for wellhead members'20096,929,244'Interference-fit seal for gate valves'20055,370,362'Gate valve'19944,911,245'Metal seal with soft inlays'19904,911,480'Torque nut for setting a graphite seal'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–2011Patents assigned to VETCO GRAY INC (5)· patent assignee history
1990–1994Based in Houston, TX, US· patent location history
1994Patents assigned to VETCO GRAY INC ABB (1)· patent assignee history
2005–2011Based in Trinity, TX, US· patent location history
2011Patents assigned to VETCOGRAY INC (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
VETCO GRAY INC51990–2011
VETCO GRAY INC ABB11994
VETCOGRAY INC12011
Locations
LocationPatentsSpan
Trinity, Texas, US42005–2011
Houston, Texas, US31990–1994