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PCE
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Search for IPC and CPC classification codes or keywords
DIFF Subgroup
G01J 1/48

using chemical effects

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Photometry, e.g. photographic exposure meter > using chemical effects

CPC:

Photometry, e.g. photographic exposure meter (spectrophotometry G01J3/00; specially adapted for radiation pyrometry G01J5/00 ) > using chemical effects

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

Child Classifications

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  • G01J 1/50 using change in colour of an indicator, e.g. actinometer IPC+CPC Available in IPC and CPC
  • G01J 1/52 using photographic effects IPC+CPC Available in IPC and CPC
  • G01J 1/54 by observing photo-reactions between gases IPC+CPC Available in IPC and CPC