GB2140555B - Diamond separation - Google Patents

Diamond separation

Info

Publication number
GB2140555B
GB2140555B GB08412601A GB8412601A GB2140555B GB 2140555 B GB2140555 B GB 2140555B GB 08412601 A GB08412601 A GB 08412601A GB 8412601 A GB8412601 A GB 8412601A GB 2140555 B GB2140555 B GB 2140555B
Authority
GB
United Kingdom
Prior art keywords
diamond separation
diamond
separation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB08412601A
Other versions
GB2140555A (en
GB8412601D0 (en
Inventor
Donald Leslie Gerrard
John Edward Preedy
James Philip Kenneth Williams
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BP PLC
Original Assignee
BP PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB838314340A external-priority patent/GB8314340D0/en
Application filed by BP PLC filed Critical BP PLC
Priority to GB08412601A priority Critical patent/GB2140555B/en
Publication of GB8412601D0 publication Critical patent/GB8412601D0/en
Publication of GB2140555A publication Critical patent/GB2140555A/en
Application granted granted Critical
Publication of GB2140555B publication Critical patent/GB2140555B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/87—Investigating jewels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/65—Raman scattering
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/08—Optical fibres; light guides

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
GB08412601A 1983-05-24 1984-05-17 Diamond separation Expired GB2140555B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08412601A GB2140555B (en) 1983-05-24 1984-05-17 Diamond separation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB838314340A GB8314340D0 (en) 1983-05-24 1983-05-24 Separation technique
GB08412601A GB2140555B (en) 1983-05-24 1984-05-17 Diamond separation

Publications (3)

Publication Number Publication Date
GB8412601D0 GB8412601D0 (en) 1984-06-20
GB2140555A GB2140555A (en) 1984-11-28
GB2140555B true GB2140555B (en) 1987-03-25

Family

ID=26286216

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08412601A Expired GB2140555B (en) 1983-05-24 1984-05-17 Diamond separation

Country Status (1)

Country Link
GB (1) GB2140555B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5206699A (en) 1988-05-06 1993-04-27 Gersan Establishment Sensing a narrow frequency band of radiation and gemstones
US5932119A (en) 1996-01-05 1999-08-03 Lazare Kaplan International, Inc. Laser marking system

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0590268B1 (en) * 1985-03-22 1998-07-01 Massachusetts Institute Of Technology Fiber Optic Probe System for Spectrally Diagnosing Tissue
GB8514992D0 (en) * 1985-06-13 1985-07-17 British Nuclear Fuels Plc Differentiation technique
GB8531330D0 (en) * 1985-12-19 1986-01-29 British Petroleum Co Plc Differentiation process
WO1987006011A1 (en) * 1986-03-24 1987-10-08 University Of Queensland Monitoring the presence of materials
JPH0714807B2 (en) * 1986-08-20 1995-02-22 ド ビアーズ コンソリデイティッド マインズ リミテッド Separation method
AU595660B2 (en) * 1986-11-12 1990-04-05 De Beers Industrial Diamond Division (Proprietary) Limited Diamond sorting
GB8700917D0 (en) * 1987-01-16 1987-02-18 British Petroleum Co Plc Separation process
GB8706421D0 (en) * 1987-03-18 1987-04-23 British Petroleum Co Plc Detection method
AU606217B2 (en) * 1987-10-07 1991-01-31 De Beers Industrial Diamond Division (Proprietary) Limited Separation of diamond particles from gangue
GB2211931B (en) * 1987-11-02 1992-02-26 De Beers Ind Diamond Sorting apparatus
GB2251306B (en) * 1988-05-06 1992-09-16 Gersan Ets Monitoring an apparatus which uses scanned radiation
GB2219394B (en) * 1988-05-06 1992-09-16 Gersan Ets Sensing a narrow frequency band of radiation and examining objects or zones
EP0358460B1 (en) * 1988-09-08 1993-12-29 De Beers Industrial Diamond Division (Proprietary) Limited Sorting apparatus
GB9103552D0 (en) * 1991-02-20 1991-04-10 Gersan Ets Classifying or sorting
DE19610393A1 (en) * 1996-03-16 1997-09-18 J & M Analytische Mess & Regeltechnik Gmbh Identification and/or classification of precious stones using light spectrometer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE786004A (en) * 1971-07-09 1973-01-08 Siemens Ag DEVICE FOR DETERMINING IMPURITIES CONTAINED IN AIR AND WATER
GB1528418A (en) * 1976-06-11 1978-10-11 Combined Optical Ind Ltd Determining monomer content in pmma elements
DE3174515D1 (en) * 1981-01-19 1986-06-05 Gunsons Sortex Ltd Sorting machine
US4394580A (en) * 1981-07-27 1983-07-19 L.C.E. Ltd. Method and apparatus for analyzing gems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5206699A (en) 1988-05-06 1993-04-27 Gersan Establishment Sensing a narrow frequency band of radiation and gemstones
US5932119A (en) 1996-01-05 1999-08-03 Lazare Kaplan International, Inc. Laser marking system

Also Published As

Publication number Publication date
GB2140555A (en) 1984-11-28
GB8412601D0 (en) 1984-06-20

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 20040516