ClassID:

167443

G01N9/18 - CPC Classification

Classification description:

Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials by observing the depth of immersion of the bodies, e.g. hydrometers Special adaptations for indicating, recording, or control

Recent Application in this class:
#1
20250347605
2025-11-13

CONCENTRATION MEASURING METHOD, CONCENTRATION MEASURING APPARATUS, AND PROGRAM

#2
20230324269
2023-10-12

Hydrometer device

#3
20230236101
2023-07-27

Buoyometer

#4
20220283067
2022-09-08

Buoyometer

#5
20220050036
2022-02-17

Strain sensor based downhole fluid density measurement tool

#6
20220011185
2022-01-13

Method and device for determining the amount of a gas present in a battery cell

#7
20210341369
2021-11-04

Sample analysis with mirrors

#8
20210199486
2021-07-01

Apparatus for determining a vertical level or density profile of a fluid column

#9
20200077631
2020-03-12

Measurement apparatus for measuring a specific gravity of a liquid, and saltwater aquarium salinity control system

#10
20190113380
2019-04-18

Fluid monitoring apparatus including fluid density detection system for subsea apparatus

#11
20180356273
2018-12-13

Detecting fluid level via a float

#12
20180348108
2018-12-06

Detecting fluid characteristics via a float

#13
20180209885
2018-07-26

Liquid density measuring device

#14
20180136102
2018-05-17

Digital hydrometer assistant reader

#15
20170131195
2017-05-11

Liquid density measuring device

#16
20170097253
2017-04-06

Density compensation for electromechanical liquid level gauges

#17
20140260607
2014-09-18

Free floating tilt hydrometer

#18
20140000349
2014-01-02

IN-LINE MEASURING DEVICES, SYSTEMS, AND METHODS

#19
20110187529
2011-08-04

METHOD FOR MONITORING THE QUALITY OF A FUEL COMPRISING ALCOHOL IN A STORAGE TANK

#20
20100095763
2010-04-22

TEMPERATURE COMPENSATED DENSITY SENSING PROCESS AND DEVICE

#21
20090056422
2009-03-05

Salometer and flow rate sensor assembly

#22
20090052946
2009-02-26

Density measuring device, liquid developer storing apparatus, and image forming apparatus

#23
20090038396
2009-02-12

Apparatus and method for detecting a change in a specific gravity of a fluid

#24
20080223130
2008-09-18

Method and device for measuring density of a liquid

#25
20070282540
2007-12-06

Method using magnetostrictive probe buoyancy for detecting fuel density

#26
20070137299
2007-06-21

Concentration detector

#27
20060266113
2006-11-30

Fuel density measuring device, system, and method using magnetostrictive probe bouyancy

#28
20060248952
2006-11-09

A METHOD AND APPARATUS FOR FLUID DENSITY SENSING