Patent Theme

Gas Stream Purification

Technologies and systems for removing unwanted components or separating desired gases from a mixed gas stream, including adsorption, absorption, and membrane-based methods.

6,107 US filings from 1,954 companies since 2023 · 2023: 1,566 · 2024: 1,876 · 2025: 1,867 · 2026 YTD: 798

Separation Processes (Filtration, Distillation)

Top companies

Ranked by filings in this theme since 2023. 2026 is partial.

#	Company	Since 2023	2023	2024	2025	2026 YTD	YoY
1	SAUDI ARABIAN OIL COMPANY	222	51	82	70	19	-14.6%
2	NGK INSULATORS, LTD.	69	13	17	32	7	+88.2%
3	Ford Global Technologies, LLC	67	47	14	6	·	-57.1%
4	MITSUBISHI HEAVY INDUSTRIES, LTD.	66	10	21	22	13	+4.8%
5	CATALER CORPORATION	63	18	18	22	5	+22.2%
6	AIR PRODUCTS AND CHEMICALS, INC.	59	9	22	18	10	-18.2%
7	Caterpillar Inc.	58	16	21	16	5	-23.8%
8	UOP LLC	58	12	15	16	15	+6.7%
9	Johnson Matthey Public Limited Company	56	23	17	12	4	-29.4%
10	BASF CORPORATION	54	15	23	14	2	-39.1%
11	Cummins Emission Solutions Inc.	51	16	19	14	2	-26.3%
12	Microjet Technology Co., Ltd.	50	4	16	21	9	+31.2%
13	SAMSUNG ELECTRONICS CO., LTD.	43	7	14	13	9	-7.1%
14	HONDA MOTOR CO., LTD.	42	3	14	22	3	+57.1%
15	KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS	42	4	21	11	6	-47.6%
16	TOYOTA JIDOSHA KABUSHIKI KAISHA	42	18	8	14	2	+75.0%
17	Hyundai Motor Company	41	21	7	10	3	+42.9%
18	EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY	40	10	16	9	5	-43.8%
19	Kia Corporation	37	17	7	10	3	+42.9%
20	Cummins Inc.	36	11	12	7	6	-41.7%
21	NITTO DENKO CORPORATION	35	1	11	15	8	+36.4%
22	L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude	33	7	12	10	4	-16.7%
23	Volvo Truck Corporation	33	13	8	5	7	-37.5%
24	HAMILTON SUNDSTRAND CORPORATION	32	18	11	3	·	-72.7%
25	L'Air Liquide, Société ANonyme pour l'Etude et l'Exploitation des Procédés Georges Claude	32	14	15	1	2	-93.3%