PlainPatent

CPC technology class · Y02

Y02W - Climate Change Mitigation Technologies Related To Wastewa…

Climate change mitigation technologies related to wastewater treatment or waste management. 9,860 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

9,860
US patents granted
#7/8
in Y02
2.5%
Y02 class share
+34%
5-yr velocity

The verdict

According to USPTO PatentsView, Climate Change Mitigation Technologies Related To Wastewa… ranks #174 of 670 CPC technology areas - 9,860 US patents granted since 2015, with recorded grant volume up 34% over five years.

#174
of 670 CPC technology areas
9,860
US patents granted, 2015–2025
Halliburton Energy Services
leading assignee (154)
+34%
grant velocity, last 5 yrs

How Y02W's grant cadence moved

Between 2020–2024, Y02W recorded 4,851 grants versus 3,618 in 2015–2019 (+34% equal-window velocity). Across complete years, output peaked in 2023 at 1,080 grants and bottomed in 2016 at 649 (+66% peak-over-trough). Lead assignee Halliburton Energy Services, Inc. holds 1.6% of the class ; the top three share 3.0%.

Leaderboard read

Y02W concentration, lead at 1.6%

Halliburton Energy Services, Inc. leads this historical grant record at 1.6% of Y02W - us corporation assignees hold 51% of class grants (2,309 of 4,496). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
1.6%

154 of 9,860 grants

Top three share
3.0%

of the class's recorded grants

Lead over #2
71

more grants than King Fahd University OF Petroleum AND Minerals

Where Y02W sits inside Y02

Among 8 subclasses in Y02 (Technologies OR Applications FOR Mitigation OR Adaptation Against Climate Change), Y02W ranks #7 and holds 2.5% of the parent class's 399,122 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

Y02E 125,003 Y02T 81,138 Y02P 65,929 Y02D 45,676 Y02B 34,811 Y02A 32,476 Y02C 4,229

Rising assignees active in Y02W

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 Guangdong Brunp Recycling Technology Co., Ltd. 61x 0 → 61 company-wide · 36 in Y02W
  2. #2 Hunan Brunp Recycling Technology Co., Ltd. 59x 0 → 59 company-wide · 34 in Y02W
  3. #3 Toppan Inc. 56x 0 → 56 company-wide · 5 in Y02W
  4. #4 Hunan Brunp EV Recycling Co., Ltd. 37x 0 → 37 company-wide · 21 in Y02W
  5. #5 Locus Solutions Ipco, LLC 35x 0 → 35 company-wide · 7 in Y02W

Y02W grants by year, peak 2023 (1,080)

US utility-patent grants per year in Y02W, 2015–2025 - recent five years are up 34% versus 2015–2019.

6007008009001,0001,1001,200 20152016201720182019202020212022202320242025 830

Who leads Y02W?

The 12 most active assignees in Climate Change Mitigation Technologies Related TO Wastewater Treatment OR Waste Management - wider bars mean more grants

patents

What this shows Halliburton Energy… is the most active filer in Y02W, holding 154 of the 9,860 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 Y02W
Rank Company Patents in Y02W
#1 Halliburton Energy Services, Inc. 154
#2 King Fahd University OF Petroleum AND Minerals 83
#3 United States Gypsum Company 63
#4 Evoqua Water Technologies LLC 52
#5 ecoATM, LLC 48
#6 Oshkosh Corporation 40
#7 Construction Research & Technology GMBH 36
#8 Guangdong Brunp Recycling Technology Co., Ltd. 36
#9 Hunan Brunp Recycling Technology Co., Ltd. 34
#10 WM Intellectual Property Holdings, L.L.C. 32
#11 Sika Technology AG 31
#12 Kemira OYJ 31
#13 Aladdin Manufacturing Corporation 31
#14 Immunolight, LLC 30
#15 Sumitomo Metal Mining Co., Ltd. 29
#16 Veolia Water Solutions & Technologies Support 28
#17 Unicharm Corporation 27
#18 Xyleco, Inc. 27
#19 Carbon Technology Holdings, LLC 25
#20 Nanjing University 24

Footprint here vs. claim strategy

Each dot is a leading Y02W 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 Y02W assignees by class footprint. Bubble size = patents in Y02W. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 0102030405060 050100150200 Patents in Y02W Avg claims / patent (company-wide) Halliburton Energy…King Fahd University…United States GypsumEvoqua WaterecoatmOshkoshConstruction Research…Guangdong Brunp…Hunan Brunp Recycling…Wm Intellectual…Sika TechnologyKemira OyjAladdin ManufacturingImmunolight
Top 14 Y02W assignees by class footprint. Bubble size = patents in Y02W. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near Y02W's 9,860-grant footprint

Nationwide nearest neighbors for Y02W (#174 of 670 by volume ; lead share 1.6%) - not the Y02 parent-class siblings above.

Nearest by grant volume

C10G 9,942 A01K 10,071 F16F 10,113 F28D 10,118

Nearest by lead-assignee share

B01L 1.6% C07D 1.5% C07K 1.5% B65D 1.6%

Questions about Y02W

Which company holds the most patents in Y02W?
Halliburton Energy Services, Inc. leads Y02W with 154 patents (1.6% of the subclass). By PatentsView assignee type, us corporations account for 51% of class grants.
Which Y02W assignees grew fastest recently?
Among assignees with ≥5 grants in Y02W, Guangdong Brunp Recycling Technology Co., Ltd. shows the highest company-wide grant multiple (61x: 0 grants in 2019–2021 → 61 in 2022–2024) while holding 36 patents in this subclass. Growth is company-wide, not class-only.
How does Y02W compare inside parent class Y02?
Inside Y02 (Technologies OR Applications FOR Mitigation OR Adaptation Against Climate Change), Y02W ranks #7 of 8 subclasses by grant volume and holds 2.5% of the parent class total. The largest sibling is Y02E (125,003 grants).

What to do with this data

Y02W in context - here's where to go next.

  • Halliburton Energy Services, Inc. leads Y02W with 154 grants in this class. See full portfolio
  • Y02W ranks #174 of 670 by grant volume among all tracked CPC technology areas. See the ranking
  • Inside parent class Y02, the largest sibling subclass is Y02E with 125,003 grants. Explore Y02E

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

Methodology - Y02W figures are USPTO PatentsView granted-utility totals for this subclass (9,860 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.