Inventor

Derek W. Hildreth

Inventor
Manchester, CT, US

Overview

10→
Patents
2000–2020
Patent span
General tagging of new technological developments
Primary field (CPC Y)

Patents· 10 as inventor

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

H01Mprimary
H01MProcesses or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy25%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution25%
C01BNon-metallic elements17%
B01DSeparation8%
C10GCracking hydrocarbon oils3%
C10LFuels not otherwise provided for3%
C25BElectrolytic or electrophoretic processes for the production of compounds or non-metals3%
F25BRefrigeration machines, plants or systems3%
F28DHeat-exchange apparatus, not provided for in another subclass, in which the heat-exchange media do not come into direct contact3%
F28FDetails of heat-exchange and heat-transfer apparatus, of general application3%

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2000–2001Based in Enfield, CT, US· patent location history
2002Based in Sunderland, MA, US· patent location history
2012–2013Patents assigned to PRESTON JR JOHN L (2)· patent assignee history
2012Based in West Hartford, CT, US· patent location history
2013–2017Patents assigned to HILDRETH DEREK W (4)· patent assignee history
2013–2018Based in Manchester, CT, US· patent location history
2014–2017Patents assigned to PRESTON JOHN L (3)· patent assignee history
2014–2017Patents assigned to FOLEY PETER F (2)· patent assignee history
2017–2020Patents assigned to DOOSAN FUEL CELL AMERICA INC (4)· patent assignee history
2017–2020Based in Temecula, CA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DOOSAN FUEL CELL AMERICA INC42017–2020
HILDRETH DEREK Wself42013–2017
PRESTON JOHN L32014–2017
FOLEY PETER F22014–2017
PRESTON JR JOHN L22012–2013
Locations
LocationPatentsSpan
Manchester, CT, US42013–2018
Temecula, California, US22017–2020
Enfield, CT, US22000–2001
West Hartford, CT, US12012
Sunderland, Massachusetts, US12002