NL77461C - - Google Patents
Info
- Publication number
- NL77461C NL77461C NL77461DA NL77461C NL 77461 C NL77461 C NL 77461C NL 77461D A NL77461D A NL 77461DA NL 77461 C NL77461 C NL 77461C
- Authority
- NL
- Netherlands
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
-
- 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
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
- G01N21/80—Indicating pH value
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Pathology (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Engineering & Computer Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Spectrometry And Color Measurement (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR829230X | 1949-02-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL77461C true NL77461C (US06291589-20010918-C00001.png) |
Family
ID=9284149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL77461D NL77461C (US06291589-20010918-C00001.png) | 1949-02-10 |
Country Status (6)
-
0
- NL NL77461D patent/NL77461C/xx active
- BE BE493805D patent/BE493805A/xx unknown
-
1949
- 1949-02-10 FR FR1011452D patent/FR1011452A/fr not_active Expired
-
1950
- 1950-02-08 GB GB3278/50A patent/GB668236A/en not_active Expired
- 1950-02-09 CH CH282769D patent/CH282769A/fr unknown
- 1950-02-10 DE DES1627A patent/DE829230C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB668236A (en) | 1952-03-12 |
| BE493805A (US06291589-20010918-C00001.png) | |
| FR1011452A (fr) | 1952-06-23 |
| DE829230C (de) | 1952-01-24 |
| CH282769A (fr) | 1952-05-15 |
