ClassID:

167803

G01N21/293 - CPC Classification

Classification description:

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light; Systems in which incident light is modified in accordance with the properties of the material investigated; 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

Recent Application in this class:
#1
20260118257
2026-04-30

APPARATUS AND METHOD FOR TESTING BLOOD

#2
20260049943
2026-02-19

KIT AND METHOD FOR MONITORING ORAL INFLAMMATION ASSOCIATED WITH PERIODONTAL DISEASES

#3
20250251385
2025-08-07

SENSOR DEVICE, OBJECT DETECTION METHOD, AND OBJECT DETECTION PROGRAM

#4
20250237612
2025-07-24

FLUID SAFETY DEVICE FOR DETECTING AND MONITORING SPOILAGE OF PERISHABLE FLUIDS

#5
20250164406
2025-05-22

Visual turbidity detection device and detection method thereof

#6
20250076280
2025-03-06

RAPID SCREENING FOR ELEVATED BILE ACIDS USING WHOLE BLOOD

#7
20240206577
2024-06-27

Clothing Cuff Clip with Contamination Indicator

#8
20230408512
2023-12-21

SYSTEM FOR EVALUATING URINE FOR THE PRESENCE OR ABSENCE OF PREGNANEDIOL GLUCURONIDE AND OTHER HORMONES AND ANALYTES

#9
20230175971
2023-06-08

KIT AND METHOD FOR MONITORING ORAL INFLAMMATION ASSOCIATED WITH PERIODONTAL DISEASES

#10
20230152214
2023-05-18

ELECTRODE QUALITY EVALUATION METHOD AND ELECTRODE MANUFACTURING METHOD

#11
20230127402
2023-04-27

Dry quality evaluation device for electrode and dry quality evaluation method for electrode

#12
20230084800
2023-03-16

METHOD OF EVALUATING THE QUALITY OF A COLOR REFERENCE CARD

#13
20220404285
2022-12-22

TEST KITS AND METHODS FOR IDENTIFICATION OF CANNABINOID COMPOUNDS

#14
20220317026
2022-10-06

FLUID TESTING SYSTEM AND APPARATUS

#15
20220222497
2022-07-14

Method for identifying dry salt flat based on sentinel-1 data

#16
20220146408
2022-05-12

Method for detection and interpretation of results indicated on a photographed diagnostic test

#17
20220144618
2022-05-12

Beverage dispense monitoring with camera

#18
20220048753
2022-02-17

Beverage dispense monitoring with camera

#19
20210293809
2021-09-23

System for evaluating urine for the presence or absence of pregnanediol glucuronide and other hormones and analytes

#20
20210156806
2021-05-27

Method for determining the presence of an acidic sulfide species in a non-aqueous liquid using a metal complex dye

#21
20200363322
2020-11-19

Sensing of markers for airborne particulate pollution by wearable colorimetry

#22
20200232927
2020-07-23

SINGLE-USE ANALYSIS BOTTLE AND COLOR RESULTS MATCHING SYSTEM FOR COLORIMETRIC REAGENTS

#23
20200149960
2020-05-14

SENSING OF SOLAR ULTRAVIOLET RADIATION BY WEARABLE COLORIMETRY

#24
20200141876
2020-05-07

Gas Detector Tube Kit and Methods of Reading Gas Detector Tubes

#25
20200128895
2020-04-30

Clothing cuff clip with contamination indicator

#26
20190250096
2019-08-15

Method for evaluating tantalum carbide

#27
20190160703
2019-05-30

Fiber based product

#28
20190137405
2019-05-09

SYSTEM FOR MONITORING AIR QUALITY IN AN ENCLOSED ENVIRONMENT

#29
20190113444
2019-04-18

URINE ANALYSIS DEVICE, METHOD AND SYSTEM

#30
20180299421
2018-10-18

Devices and methods for detecting an explosive substance

#31
20180268568
2018-09-20

Color analysis and control using an electronic mobile device transparent display screen

#32
20180136141
2018-05-17

Method of testing the color quality of a colored gemstone

#33
20180113107
2018-04-26

Devices and methods for detecting an explosive substance

#34
20180113106
2018-04-26

Devices and methods for detecting an explosive substance

#35
20180113071
2018-04-26

TEST KIT INCLUDING CASE AND PARTITIONED COLLECTOR

#36
20180067105
2018-03-08

Test strip, inspection system and inspection method thereof

#37
20180031536
2018-02-01

Determination of aqueous nitrate concentration

#38
20180017498
2018-01-18

Method and apparatus for analyte measurement

#39
20180003621
2018-01-04

Urine analysis device, method and system

#40
20170328774
2017-11-16

Index for determining a quality of a color

#41
20170184507
2017-06-29

Systems and methods for detecting nitric oxide

#42
20170183599
2017-06-29

Corrosion inhibiting hydraulic fluid additive

#43
20170001329
2017-01-05

Fiber based product

#44
20160258874
2016-09-08

Gas detector tube template and methods of reading gas detector tubes

#45
20160244688
2016-08-25

Corrosion inhibiting hydraulic fluid additive

#46
20160077070
2016-03-17

Colorimetric sensors for alkylating agents

#47
20150297119
2015-10-22

Medical device or system for measuring hemoglobin levels during accidents using a camera-projector system

#48
20150293069
2015-10-15

Method for determining expected shelf life of seafood

#49
20150285966
2015-10-08

Minimum retroreflectivity compliance system, method and assembly

#50
20150253301
2015-09-10

IN VITRO METHOD AND APPARATUS FOR DETERMINING EFFICACY AND ACTION MECHANISMS OF A TOPICAL COMPOSITION ON VARIOUS SKIN COLOR TYPES

#51
20150055134
2015-02-26

Method and system for analyzing a colorimetric assay

#52
20150044777
2015-02-12

Visual indication test kit

#53
20150005469
2015-01-01

Method for measuring the thermal stability of a succinic acid crystal intended for the production of polymers

#54
20140170757
2014-06-19

Method and apparatus for analyte measurement

#55
20130312497
2013-11-28

Liquid quality checking device and liquid storage tank provided with the device

#56
20130272603
2013-10-17

Light source comparator and calibration apparatus

#57
20130128272
2013-05-23

Minimum retroreflectivity compliance system, method and assembly

#58
20130102086
2013-04-25

METHODS AND APPARATUSES FOR DETECTING A CORROSION INHIBITOR

#59
20120273697
2012-11-01

Detection apparatus and detection method

#60
20120178176
2012-07-12

Color coded swipe for portable explosive or drug detection system

#61
20120164030
2012-06-28

CHEMICAL RESERVOIR FOR PORTABLE EXPLOSIVE OR DRUG DETECTION SYSTEM

#62
20120052588
2012-03-01

MEANS AND METHOD FOR THE DETERMINATION OF THE ALDEHYDE CONTENT

#63
20110300572
2011-12-08

IN VITRO METHOD AND APPARATUS FOR DETERMINING EFFICACY AND ACTION MECHANISMS OF A TOPICAL COMPOSITION ON VARIOUS SKIN COLOR TYPES

#64
20110064307
2011-03-17

Methods for recommending personal care product and tools therefor

#65
20100265508
2010-10-21

Soot number determining device and method for determining a soot number

#66
20100208273
2010-08-19

Apparatus for observing the surface of a sample

#67
20090196496
2009-08-06

Methods for recommending a personal care product and tools therefor

#68
20080206874
2008-08-28

Analysis of Functional Fluids

#69
20080190354
2008-08-14

DETECTION SYSTEM

#70
20080185534
2008-08-07

Ultraviolet radiation monitoring device and a method of using the same

#71
20070153256
2007-07-05

Method and system for color grading of gemstones

#72
20070091296
2007-04-26

Article and method of assessing source authenticity for an opaque colored part

#73
20060127543
2006-06-15

Non-invasive colorimetric ripeness indicator