Patents
US patents through Dec 31, 2025 · PatentsView, from the USPTO’s Open Data Portal · read Oct 27, 2026
32 patents granted to the 5 names below, as the owner printed on each patent when it was granted. A later sale, a lapse or an expiry is not read, so this is what was granted to AXT Inc’s names, not what it holds today.
Patents granted
32
32 utility, 1976 to Dec 31, 2025
Granted in 2025
5
Against 4 in 2024 and 2 in 2023
Applications published
32
1 of them in 2025
Names they are printed under
5
its own name, a subsidiary, a former name
By yearGrantedApplications published
'09'10'11'12'13'14'15'16'17'20'21'22'23'24'25
Each pair is one calendar year. Applications are published about eighteen months after filing, so the newest years read low.
What they are aboutgrants since 2021
Semiconductors9
Surface technology, coating4
Measurement1
The main technology area of each patent, in the World Intellectual Property Organization’s 35 fields.
Under which name5 counted
AXT, INC. its own name
US, as the owner printed on each patent
11 publishedBeijing Tongmei Xtal Technology Co., Ltd. a subsidiary
CN, as the owner printed on each patent
3 publishedAXT, Inc. its own name
named as the applicant on its applications, in US
10 publishedBEIJING TONGMEI XTAL TECHNOLOGY CO., LTD. a subsidiary
named as the applicant on its applications, in CN
8 publishedAmerican Xtal Technology, Inc. a former name
US, as the owner printed on each patent
0 published
Newest grantseach row opens the USPTO’s own copy
| Granted | Patent | Title | Field | Owner as printed |
|---|
| Dec 30, 2025 | 12,512,352 | Ventilated puck | Semiconductors | Beijing Tongmei Xtal Technology Co., Ltd. |
| Aug 26, 2025 | 12,398,486 | Method and system for vertical gradient freeze 8 inch gallium arsenide substrates | Surface technology, coating | AXT, INC. |
| Jun 17, 2025 | 12,336,319 | Germanium single-crystal wafer, method for preparing germanium single-crystal wafer, method for preparing crystal bar, and use of single-crystal wafer | Semiconductors | Beijing Tongmei Xtal Technology Co., Ltd. |
| Apr 15, 2025 | 12,276,044 | Low etch pit density gallium arsenide crystals with boron dopant | Surface technology, coating | AXT, INC. |
| Mar 4, 2025 | 12,241,845 | Method and setup for detecting surface haze of materials | Measurement | Beijing Tongmei Xtal Technology Co., Ltd. |
| Sep 10, 2024 | 12,084,790 | Low etch pit density 6 inch semi-insulating gallium arsenide wafers | Semiconductors | AXT, INC. |
| Aug 6, 2024 | 12,054,851 | Low etch pit density, low slip line density, and low strain indium phosphide | Surface technology, coating | AXT, INC. |
| Jul 16, 2024 | 12,040,206 | Ventilated puck | Semiconductors | Beijing Tongmei Xtal Technology Co., Ltd. |
| Jul 9, 2024 | 12,033,877 | Ventilated wafer cassette | Semiconductors | Beijing Tongmei Xtal Technology Co., Ltd. |
| Jun 20, 2023 | 11,680,340 | Low etch pit density 6 inch semi-insulating gallium arsenide wafers | Semiconductors | AXT, INC. |
Newest applications publishedan application is a clue, never a plan
| Published | Application | Title | Field | Owner as printed |
|---|
| Jul 17, 2025 | 2025/0230576 | METHOD AND SYSTEM FOR VERTICAL GRADIENT FREEZE 8 INCH GALLIUM ARSENIDE SUBSTRATES | Surface technology, coating | AXT, Inc. |
| Dec 26, 2024 | 2024/0426025 | LOW ETCH PIT DENSITY 6 INCH SEMI-INSULATING GALLIUM ARSENIDE WAFERS | Semiconductors | AXT, Inc. |
| Nov 21, 2024 | 2024/0384436 | LOW ETCH PIT DENSITY, LOW SLIP LINE DENSITY, AND LOW STRAIN INDIUM PHOSPHIDE | Surface technology, coating | AXT, Inc. |
| Oct 31, 2024 | 2024/0363381 | VENTILATED PUCK | Semiconductors | BEIJING TONGMEI XTAL TECHNOLOGY CO., LTD. · patent 12,512,352 granted from it |
| Dec 28, 2023 | 2023/0416941 | METHOD AND SYSTEM FOR VERTICAL GRADIENT FREEZE 8 INCH GALLIUM ARSENIDE SUBSTRATES | Surface technology, coating | AXT, Inc. · patent 12,398,486 granted from it |
| Dec 21, 2023 | 2023/0407522 | LOW ETCH PIT DENSITY 6 INCH SEMI-INSULATING GALLIUM ARSENIDE WAFERS | Semiconductors | AXT, Inc. · patent 12,084,790 granted from it |
| Oct 26, 2023 | 2023/0341336 | METHOD AND SETUP FOR DETECTING SURFACE HAZE OF MATERIALS | Measurement | BEIJING TONGMEI XTAL TECHNOLOGY CO., LTD. · patent 12,241,845 granted from it |
| Jul 6, 2023 | 2023/0212784 | LOW ETCH PIT DENSITY, LOW SLIP LINE DENSITY, AND LOW STRAIN INDIUM PHOSPHIDE | Surface technology, coating | AXT, Inc. · patent 12,054,851 granted from it |
| Dec 29, 2022 | 2022/0415685 | VENTILATED PUCK | Semiconductors | BEIJING TONGMEI XTAL TECHNOLOGY CO., LTD. · patent 12,040,206 granted from it |
| Dec 29, 2022 | 2022/0415684 | VENTILATED WAFER CASSETTE | Semiconductors | BEIJING TONGMEI XTAL TECHNOLOGY CO., LTD. · patent 12,033,877 granted from it |
What it applied for, 2024 to 2025: Semiconductors 2 · Surface technology, coating 2.
A patent is counted where the owner printed on it when it was granted carries the company’s own name, a former name, the name of a subsidiary its annual report lists, or its own name with a patent-holding phrase (Technology Licensing, Intellectual Property and the like), once the legal form, case and punctuation are set aside, and prints a country that name counts in. PatentsView’s data are published under the Creative Commons Attribution 4.0 licence. Source: PatentsView's granted patents and pre-grant publications, disambiguated, from the USPTO's Open Data Portal, through Dec 31, 2025, read Oct 27, 2026.