FR824554A - Device for the determination of chemical values by color comparison - Google Patents

Device for the determination of chemical values by color comparison

Info

Publication number
FR824554A
FR824554A FR824554DA FR824554A FR 824554 A FR824554 A FR 824554A FR 824554D A FR824554D A FR 824554DA FR 824554 A FR824554 A FR 824554A
Authority
FR
France
Prior art keywords
determination
color comparison
chemical values
chemical
values
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
Other languages
French (fr)
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.)
Hellige & Compagnieg M B H F
Original Assignee
Hellige & Compagnieg M B H F
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
Application filed by Hellige & Compagnieg M B H F filed Critical Hellige & Compagnieg M B H F
Application granted granted Critical
Publication of FR824554A publication Critical patent/FR824554A/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
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/29—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection
    • G01N21/293—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection with colour charts, graduated scales or turrets

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
FR824554D 1936-10-02 1937-07-20 Device for the determination of chemical values by color comparison Expired FR824554A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE497458X 1936-10-02

Publications (1)

Publication Number Publication Date
FR824554A true FR824554A (en) 1938-02-11

Family

ID=6545175

Family Applications (1)

Application Number Title Priority Date Filing Date
FR824554D Expired FR824554A (en) 1936-10-02 1937-07-20 Device for the determination of chemical values by color comparison

Country Status (2)

Country Link
FR (1) FR824554A (en)
GB (1) GB497458A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0359550A2 (en) * 1988-09-16 1990-03-21 Exocell, Inc. Analytic reader device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8523071D0 (en) * 1985-09-18 1985-10-23 Crutch S A Detector/indicator of visible information

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0359550A2 (en) * 1988-09-16 1990-03-21 Exocell, Inc. Analytic reader device
EP0359550A3 (en) * 1988-09-16 1991-05-08 Exocell, Inc. Analytic reader device
US5057275A (en) * 1988-09-16 1991-10-15 Exocell, Inc. Analytic reader device

Also Published As

Publication number Publication date
GB497458A (en) 1938-12-20

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