PlainPatent

CPC technology class · B22

B22D - Casting OF Metals

Casting of metals; casting of other substances by the same processes or devices. 4,425 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

4,425
US patents granted
B22
Parent CPC class
20
Active assignees
+3%
5-yr velocity

The verdict

Casting OF Metals ranks #259 of 670 CPC technology areas - 4,425 US patents granted since 2015, with filing up 3% over five years.

#259
of 670 CPC technology areas
4,425
US patents granted, 2015–2025
General Electric
leading assignee (101)
+3%
filing velocity, last 5 yrs
Top assignee: General Electric Company (101 patents)

CPC subclass B22D - CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES - covers 4,425 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class B22 (CASTING; POWDER METALLURGY). See our CPC classification guide for how the system works.

The competitive landscape in B22D is shaped by 20 distinct companies actively filing in this space. General Electric Company leads with 101 patents, followed by Nippon Steel Corporation at 58 grants and JFE Steel Corporation at 57.

Filing activity in B22D is up 3% over the past five years versus 2015-2019, a relatively steady filing pace. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is B22D innovation accelerating?

US utility-patent grants per year in B22D, 2015–2025 - recent five years are up 3% versus 2015–2019.

100200300400500600 20152016201720182019202020212022202320242025 197

Who leads B22D?

The 12 most active assignees in CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES - wider bars mean more grants

patents

What this shows General Electric is the most active filer in B22D, holding 101 of the 4,425 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 B22D
Rank Company Patents in B22D
#1 Novelis Inc. 59
#2 Nippon Steel Corporation 58
#3 JFE Steel Corporation 57
#4 Molten Metal Equipment Innovations, Llc 55
#5 Citic Dicastal Co., Ltd. 52
#6 Nippon Steel & Sumitomo Metal Corporation 46
#7 Sintokogio, Ltd. 43
#8 Refractory Intellectual Property Gmbh & Co. KG 39
#9 Nucor Corporation 37
#10 SMS Group Gmbh 36
#11 Posco Co., Ltd 31
#12 Baoshan IRON & Steel Co., Ltd. 31
#13 Danieli & C. Officine Meccaniche S.p.a. 31
#14 Crucible Intellectual Property, Llc 26
#15 Krosakiharima Corporation 26
#16 Primetals Technologies Austria Gmbh 24
#17 ATI Properties Llc 24
#18 Nippon Light Metal Company, Ltd. 23
#19 Pyrotek, Inc. 23
#20 Vesuvius Group, S.a. 23

About This Class

CPC subclass B22D belongs to class B22.

4,425 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 B22D 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 B22D assignees by class footprint. Bubble size = patents in B22D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 B22D assignees by class footprint. Bubble size = patents in B22D. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 051015202530 203040506070 Patents in B22D Avg claims / patent (company-wide) NovelisNippon SteelJfe SteelMolten Metal Equipmen…Citic DicastalNippon Steel & Sumito…SintokogioRefractory Intellectu…NucorSms groupPoscoBaoshan Iron & SteelDanieli & C Officine…Crucible Intellectual…
Top 14 B22D assignees by class footprint. Bubble size = patents in B22D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class B22D?
CPC subclass B22D covers CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES. It belongs to CPC class B22 (CASTING; POWDER METALLURGY), with 4,425 US utility patents granted since 2015.
How many patents have been filed in B22D?
4,425 US utility patents were granted in CPC subclass B22D between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in B22D?
General Electric Company leads B22D with 101 patents, making it the most active assignee in this technology area.
How is patent data for B22D 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., B22) is a broad technology category. Subclasses like B22D 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.