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Inventor

Alan F. Diwell

Inventor
Reading, GB

Overview

8→
Patents
1976–2005
Patent span
Performing operations
Primary field (CPC B)

Patents· 8 as inventor

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

B01Dprimary
B01DSeparation27%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry20%
Y02TClimate change mitigation technologies related to transportation20%
F02BInternal-combustion piston engines10%
Y02ATechnologies for adaptation to climate change10%
F01NGas-flow silencers or exhaust apparatus for machines or engines in general7%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%
PatentTitleYear
6,948,308'Combatting air pollution'20056,546,717'Combatting air pollution'20034,996,180'Catalyst of copper oxide and ceria'19914,539,311'Process for making a lead-tolerant catalyst system for purifying exhaust'19854,478,797'Exhaust gas purification'19844,127,510'Catalyst for the purification of an exhaust gas'19784,089,810'Catalyst'19783,972,837'Catalyst for purifying automotive exhaust gases'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1984Patents assigned to JOHNSON MATTHEY CO LTD (4)· patent assignee history
1976–1978Based in London, GB· patent location history
1978–1991Based in Reading, GB· patent location history
1985–2005Patents assigned to JOHNSON MATTHEY PLC (4)· patent assignee history
1985Based in Oxfordshire, GB· patent location history
2003–2005Based in Sonning Common, GB· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
JOHNSON MATTHEY CO LTD41976–1984
JOHNSON MATTHEY PLC41985–2005
Locations
LocationPatentsSpan
Reading, GB31978–1991
Sonning Common, GB22003–2005
London, GB21976–1978
Oxfordshire, GB11985