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Inventor

Janek Porowski

Inventor
Pittsburgh, PA, US

Overview

3→
Patents
1984–2001
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 3 as inventor

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

F28Fprimary
F28FDetails of heat-exchange and heat-transfer apparatus, of general application22%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests22%
B21DWorking or processing of sheet metal or metal tubes, rods or profiles without essentially removing material11%
B23KSoldering or unsoldering11%
F16JPistons11%
F16LPipes11%
F28DHeat-exchange apparatus, not provided for in another subclass, in which the heat-exchange media do not come into direct contact11%
PatentTitleYear
6,189,768'Process and apparatus for pressing an external sleeve onto a tube for enhancing weld design'20015,538,261'Mechanical heat-exchange tube sealing system'19964,434,840'Expansion joint for reactor or heat exchanger'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984Patents assigned to ODONNELL & ASS (1)· patent assignee history
1984–2001Based in Pittsburgh, PA, US· patent location history
1996–2001Patents assigned to COLUMBIAN CHEM (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
COLUMBIAN CHEM21996–2001
ODONNELL & ASS11984
Locations
LocationPatentsSpan
Pittsburgh, Pennsylvania, US31984–2001