PlainPatent

CPC technology class · B04

B04C - Apparatus Using FREE Vortex FLOW

Apparatus using free vortex flow, e.g. cyclones. 873 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

873
US patents granted
B04
Parent CPC class
20
Active assignees
+44%
5-yr velocity

The verdict

Apparatus Using FREE Vortex FLOW ranks #476 of 670 CPC technology areas - 873 US patents granted since 2015, with filing up 44% over five years.

#476
of 670 CPC technology areas
873
US patents granted, 2015–2025
Omachron Intellectual…
leading assignee (97)
+44%
filing velocity, last 5 yrs
Top assignee: Omachron Intellectual Property Inc. (97 patents)

CPC subclass B04C - APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES - covers 873 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class B04 (CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES). See our CPC classification guide for how the system works.

The competitive landscape in B04C is shaped by 20 distinct companies actively filing in this space. Omachron Intellectual Property Inc. leads with 97 patents, followed by Dyson Technology Limited at 22 grants and Cidra Corporate Services Llc at 18.

Filing activity in B04C is up 44% over the past five years versus 2015-2019, a sharp acceleration suggesting an emerging or fast-moving technology area. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is B04C innovation accelerating?

US utility-patent grants per year in B04C, 2015–2025 - recent five years are up 44% versus 2015–2019.

20406080100120 20152016201720182019202020212022202320242025 41

Who leads B04C?

The 12 most active assignees in APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES - wider bars mean more grants

patents

What this shows Omachron Intellectual… is the most active filer in B04C, holding 97 of the 873 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 B04C
Rank Company Patents in B04C
#1 Omachron Intellectual Property Inc. 97
#2 Dyson Technology Limited 22
#3 Cidra Corporate Services Llc 18
#4 Qwtip Llc 14
#5 Mann+hummel Gmbh 13
#6 Hayward Industries, Inc. 8
#7 Vermeer Manufacturing Company 7
#8 ADEY Holdings (2008) Limited 7
#9 Jiangsu Midea Cleaning Appliances Co., Ltd. 7
#10 M-I L.l.c. 6
#11 Techtronic Industries Co. Ltd. 6
#12 Vulco S.a. 6
#13 FMC Separation Systems, BV 6
#14 Techtronic Floor Care Technology Limited 5
#15 X'pole Precision Tools Inc. 5
#16 Enercorp Engineered Solutions, Llc 5
#17 KBK Industries, Llc 5
#18 Supercritical Fluid Technologies, Inc. 5
#19 Elemental Scientific, Inc. 4
#20 Koganei Corporation 4

About This Class

CPC subclass B04C belongs to class B04.

873 patents were granted in this class between 2015 and 2025.

20 companies actively patent in this space.

Classification System

Cooperative Patent Classification (CPC) is a hierarchical patent classification system used by the USPTO and EPO.

← All Technology Classes Technology Rankings →

Footprint here vs. claim strategy

Each dot is a leading B04C 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 B04C assignees by class footprint. Bubble size = patents in B04C. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 B04C assignees by class footprint. Bubble size = patents in B04C. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 51015202530 050100150 Patents in B04C Avg claims / patent (company-wide) Omachron Intellectual…Dyson TechnologyCidra Corporate Servi…QwtipMann+HummelHayward IndustriesVermeer ManufacturingAdey Holdings (2008)Jiangsu Midea Cleanin…M-i L L CTechtronic IndustriesVulcoFmc Separation System…Techtronic Floor Care…
Top 14 B04C assignees by class footprint. Bubble size = patents in B04C. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class B04C?
CPC subclass B04C covers APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES. It belongs to CPC class B04 (CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES), with 873 US utility patents granted since 2015.
How many patents have been filed in B04C?
873 US utility patents were granted in CPC subclass B04C between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in B04C?
Omachron Intellectual Property Inc. leads B04C with 97 patents, making it the most active assignee in this technology area.
How is patent data for B04C collected?
Patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office. It covers all US granted utility patents and assigns CPC codes based on the technology described in each patent.
What is the difference between CPC class and subclass?
A CPC class (e.g., B04) is a broad technology category. Subclasses like B04C provide finer granularity within that category. PlainPatent organizes data at the subclass level (4-character codes) for the most useful view of technology domains.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent Editorial

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.