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Inventor

Derek Farnham Williams

Inventor
London, GB

Overview

3→
Patents
1976–2015
Patent span
General tagging of new technological developments
Primary field (CPC Y)

Patents· 3 as inventor

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

C10Gprimary
C10GCracking hydrocarbon oils25%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests25%
B01DSeparation13%
F15DFluid dynamics, i.e. methods or means for influencing the flow of gases or liquids13%
G01NInvestigating or analysing materials by determining their chemical or physical properties13%
Y10TTechnical subjects covered by former us classification13%
PatentTitleYear
8,931,908'Air purge collar'20154,108,760'Extraction of oil shales and tar sands'19783,970,541'Gas extraction of coal'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1978Patents assigned to COAL INDUSTRY PATENTS LTD (2)· patent assignee history
1976–1978Based in London, GB· patent location history
2015Patents assigned to CARLSON PAUL (1)· patent assignee history
2015Patents assigned to FLUKE CORP (1)· patent assignee history
2015Patents assigned to GARNIER GARY (1)· patent assignee history
2015Patents assigned to STEMER KENT (1)· patent assignee history
2015Based in Santa Cruz, CA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
COAL INDUSTRY PATENTS LTD21976–1978
CARLSON PAUL12015
FLUKE CORP12015
GARNIER GARY12015
STEMER KENT12015
Locations
LocationPatentsSpan
London, GB21976–1978
Santa Cruz, California, US12015