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CPC technology class · B08

B08B - Cleaning In General

Cleaning in general; prevention of fouling in general. 9,052 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

9,052
US patents granted
#1/1
in B08
100.0%
B08 class share
+37%
5-yr velocity

The verdict

According to USPTO PatentsView, Cleaning In General ranks #179 of 670 CPC technology areas - 9,052 US patents granted since 2015, with recorded grant volume up 37% over five years.

#179
of 670 CPC technology areas
9,052
US patents granted, 2015–2025
Tokyo Electron
leading assignee (261)
+37%
grant velocity, last 5 yrs

How B08B's grant cadence moved

Between 2020–2024, B08B recorded 4,676 grants versus 3,404 in 2015–2019 (+37% equal-window velocity). Across complete years, output peaked in 2024 at 1,010 grants and bottomed in 2015 at 531 (+90% peak-over-trough). Lead assignee Tokyo Electron Limited holds 2.9% of the class ; the top three share 7.2%.

Leaderboard read

B08B concentration, lead at 2.9%

Tokyo Electron Limited leads this historical grant record at 2.9% of B08B - foreign corporation assignees hold 53% of class grants (2,174 of 4,064). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
2.9%

261 of 9,052 grants

Top three share
7.2%

of the class's recorded grants

Lead over #2
44

more grants than Screen Holdings Co., Ltd.

Rising assignees active in B08B

Company-wide grant multiples (2022–2024 vs 2019–2021) among assignees with ≥5 patents in this subclass. Growth is company-wide; class patent counts are subclass-specific.

  1. #1 Changxin Memory Technologies, Inc. 63x 17 → 1,066 company-wide · 14 in B08B
  2. #2 Cana Technology, Inc. 21x 0 → 21 company-wide · 8 in B08B
  3. #3 Yunjing Intelligence Innovation (SHENZHEN) Co., Ltd. 14x 0 → 14 company-wide · 5 in B08B
  4. #4 Shenzhen FLY Rodent Dynamics Intelligent Technology Co., Ltd. 9.00x 2 → 18 company-wide · 5 in B08B
  5. #5 Z Intellectual Property Holding Company, LLC 8.00x 1 → 8 company-wide · 9 in B08B

B08B grants by year, peak 2024 (1,010)

US utility-patent grants per year in B08B, 2015–2025 - recent five years are up 37% versus 2015–2019.

4006008001,0001,200 20152016201720182019202020212022202320242025 677

Who leads B08B?

The 12 most active assignees in Cleaning IN GENERAL; Prevention OF Fouling IN General - wider bars mean more grants

patents

What this shows Tokyo Electron is the most active filer in B08B, holding 261 of the 9,052 patents in this class. Concentration at the top signals how contestable this technology area is for new entrants.

Source USPTO PatentsView, granted utility patents As of 2015–2025 grant years
View data table
Top patent holders in CPC subclass B08B
Rank Company Patents in B08B
#1 Tokyo Electron Limited 261
#2 Screen Holdings Co., Ltd. 217
#3 Applied Materials, Inc. 173
#4 Ecolab USA Inc. 152
#5 Ebara Corporation 121
#6 Semes Co., Ltd. 114
#7 Lam Research Corporation 53
#8 Stoneage, Inc. 38
#9 Sugino Machine Limited 33
#10 Gecko Robotics, Inc. 30
#11 KHS GmbH 29
#12 Valeo Systemes d'Essuyage 27
#13 Ridge Tool Company 27
#14 Krones AG 26
#15 ACM Research (SHANGHAI), Inc. 25
#16 THE Clorox Company 24
#17 Toshiba Memory Corporation 22
#18 Koito Manufacturing Co., Ltd. 21
#19 Georgia-Pacific Consumer Products LP 21
#20 Citic Dicastal Co., Ltd. 20

Footprint here vs. claim strategy

Each dot is a leading B08B assignee, placed by how many patents it holds in this class (horizontal) against its company-wide average claims per patent (vertical) - a read on whether the class is led by broad-but-shallow filers or focused deep-claim players.

Top 14 B08B assignees by class footprint. Bubble size = patents in B08B. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 0100200300 Patents in B08B Avg claims / patent (company-wide) Tokyo ElectronScreen HoldingsApplied MaterialsEcolab UsaEbaraSemesLam ResearchStoneageSugino MachineGecko RoboticsKhsValeo Systemes…Ridge ToolKrones
Top 14 B08B assignees by class footprint. Bubble size = patents in B08B. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near B08B's 9,052-grant footprint

Nationwide nearest neighbors for B08B (#179 of 670 by volume ; lead share 2.9%) - not the B08 parent-class siblings above.

Nearest by grant volume

A23V 9,116 C03C 8,986 E05B 9,176 F25D 8,866

Nearest by lead-assignee share

B63B 2.9% B03B 2.9% F15B 2.9% C12R 2.9%

Questions about B08B

Which company holds the most patents in B08B?
Tokyo Electron Limited leads B08B with 261 patents (2.9% of the subclass). By PatentsView assignee type, foreign corporations account for 53% of class grants.
Which B08B assignees grew fastest recently?
Among assignees with ≥5 grants in B08B, Changxin Memory Technologies, Inc. shows the highest company-wide grant multiple (63x: 17 grants in 2019–2021 → 1,066 in 2022–2024) while holding 14 patents in this subclass. Growth is company-wide, not class-only.

What to do with this data

B08B in context - here's where to go next.

Figures reflect USPTO PatentsView grant data through 2026-05-15; pending applications not yet granted are not counted.

Methodology - B08B figures are USPTO PatentsView granted-utility totals for this subclass (9,052 grants in the tracked window).

Every figure on PlainPatent is rendered directly from USPTO source data, no number is typed in by an editor. This page draws directly on USPTO source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.