Inventor

Derek John Fray

Inventor

Cambridge, GB

Overview

36→

Patents

1978–2020

Patent span

Chemistry

Primary field (CPC C)

Patents· 36 as inventor

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

C25Cprimary

C25CProcesses for the electrolytic production, recovery or refining of metals16%

C22BProduction and refining of metals13%

G01NInvestigating or analysing materials by determining their chemical or physical properties9%

C25BElectrolytic or electrophoretic processes for the production of compounds or non-metals8%

Y02PClimate change mitigation technologies in the production or processing of goods7%

B82YSpecific uses or applications of nanostructures6%

C01BNon-metallic elements5%

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution5%

C01GCompounds containing metals not covered by subclasses c01d or c01f4%

H01MProcesses or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy4%

PatentTitleYear

10,865,488Method of producing graphene2020 10,556,211Method for producing synthetic diamonds2020 10,458,026Method of producing graphene2019 10,106,899Oxygen generation apparatus and method2018 9,181,604'Treatment of titanium ores'2015 9,028,671'Hydrogen sensing apparatus and method'2015 8,790,953'Method for texturing silicon surface to create black silicon for photovoltaic applications'2014 8,722,961'Hyperbaric dressing'2014 8,313,624'Electrode materials'2012 8,057,658'Electrochemical method, apparatus and carbon product'2011 7,879,219'Electrochemical processing of solid materials in fused salt'2011 7,790,014'Removal of substances from metal and semi-metal compounds'2010 7,544,227'Microwave enhancement of the segregation roast'2009 7,338,588'Intermetallic compounds'2008 7,189,476'Rechargeable lithium cell having an anode comprised of carbon nanotubes'2007 6,712,952'Removal of substances from metal and semi-metal compounds'2004 6,641,712'Process for the recovery of tin, tin alloys or lead alloys from printed circuit boards'2003 6,599,413'Method and apparatus for the treatment of a melt'2003 6,309,534'Apparatus and method for measuring the composition of gases using ionically conducting electrolytes'2001 5,698,759'Treatment of polyvinylchloride'1997 5,192,404'Method for measuring a minor element in a molten metal'1993 5,096,552'Monitoring of pyrometallurgical processes'1992 4,999,092'Transporting a liquid past a barrier'1991 4,904,356'Electrode for electrorefining'1990 4,879,005'Electrochemical sensor for hydrogen sensing'1989 4,869,790'Metal separation process'1989 4,857,156'Separating a ferro alloy'1989 4,800,069'Zinc recovery from furnace dust'1989 4,645,650'Obtaining aqueous solution from insoluble metal oxide'1987 4,412,893'Anode-assisted cation reduction'1983 4,292,147'Zinc chloride electrolysis'1981 4,217,179'Determination of lithium, sensor therefor and method of making said sensor'1980 4,166,013'Method of making metal beta-alumina and refining metal using it'1979 4,166,009'Method for detecting elements'1979 4,118,292'Packed bed electrorefining and electrolysis'1978 4,085,023'Apparatus for detecting elements'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1990Patents assigned to NAT RES DEV (12)· patent assignee history

1978–1990Based in Trumpington, GB· patent location history

1979–2020Based in Cambridge, GB· patent location history

1992–1993Patents assigned to MINERAL IND RES ORG (2)· patent assignee history

1997Based in Kirk Deighton, Nr Wetherby, GB· patent location history

2003Based in Cambridgeshire, GB· patent location history

2007–2014Based in Great Shelford, GB· patent location history

2008–2020Patents assigned to CAMBRIDGE ENTPR LTD (5)· patent assignee history

2010–2011Patents assigned to METALYSIS LTD (2)· patent assignee history

2011–2015Patents assigned to FRAY DEREK JOHN (4)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
NAT RES DEV	12	1978–1990
CAMBRIDGE ENTPR LTD	5	2008–2020
FRAY DEREK JOHNself	4	2011–2015
METALYSIS LTD	2	2010–2011
MINERAL IND RES ORG	2	1992–1993

Locations

Location	Patents	Span
Cambridge, GB	23	1979–2020
Trumpington, GB	7	1978–1990
Great Shelford, GB	3	2007–2014
Cambridgeshire, GB	1	2003
Kirk Deighton, Nr Wetherby, GB	1	1997