Patents
US patents through Dec 31, 2025 · PatentsView, from the USPTO’s Open Data Portal · read Oct 27, 2026
10 patents granted to the 4 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 Ampco-Pittsburgh Corp.’s names, not what it holds today.
Patents granted
10
10 utility, 1976 to Dec 31, 2025
Granted in 2025
1
in the last year the record reads
Applications published
7
1 of them in 2025
Names they are printed under
4
a subsidiary, its own name
By yearGrantedApplications published
'80'81'87'04'10'12'14'18'19'20'23'25
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
The main technology area of each patent, in the World Intellectual Property Organization’s 35 fields.
Under which name4 counted
AIR AND LIQUID SYSTEMS, LLC a subsidiary
US, as the owner printed on each patent
4 publishedAmpco-Pittsburgh Corporation its own name
US, as the owner printed on each patent
0 publishedAir and Liquid Systems, Inc. a subsidiary
named as the applicant on its applications, in US
2 publishedÅkers AB a subsidiary
SE, as the owner printed on each patent
1 published
Newest grantseach row opens the USPTO’s own copy
| Granted | Patent | Title | Field | Owner as printed |
|---|
| Jul 8, 2025 | 12,350,695 | Pallet coating waste recovery system | Chemical engineering | AIR AND LIQUID SYSTEMS, LLC |
| Sep 22, 2020 | 10,780,374 | Animal byproduct recovery system | Chemical engineering | AIR AND LIQUID SYSTEMS, LLC |
| May 5, 2020 | 10,640,408 | Animal byproduct recovery system | Chemical engineering | AIR AND LIQUID SYSTEMS, LLC |
| Jan 7, 2020 | 10,525,380 | Floating chopper sludge weir | Chemical engineering | AIR AND LIQUID SYSTEMS, LLC |
| Dec 30, 2014 | 8,920,296 | Forged roll meeting the requirements of the cold rolling industry and a method for production of such a roll | Materials, metallurgy | Åkers AB |
| Aug 3, 2010 | 7,767,085 | Oil-sludge filtration system having a free floating weir box | Chemical engineering | AIR AND LIQUID SYSTEMS, LLC |
| Jul 13, 2004 | 6,761,820 | Paint-sludge filtration system featuring pool aeration using high-pressure discharge from filter vacuum producer | Chemical engineering | AIR AND LIQUID SYSTEMS, LLC |
| Apr 7, 1987 | 4,655,256 | Threaded end protector and component | Handling | Ampco-Pittsburgh Corporation |
| Apr 7, 1981 | 4,260,435 | Copper-nickel-silicon-chromium alloy having improved electrical conductivity | Materials, metallurgy | Ampco-Pittsburgh Corporation |
| Mar 4, 1980 | 4,191,601 | Copper-nickel-silicon-chromium alloy having improved electrical conductivity | Materials, metallurgy | Ampco-Pittsburgh Corporation |
Newest applications publishedan application is a clue, never a plan
| Published | Application | Title | Field | Owner as printed |
|---|
| Sep 25, 2025 | 2025/0296108 | PALLET COATING WASTE RECOVERY SYSTEM | Chemical engineering | Air and Liquid Systems, Inc. |
| Mar 16, 2023 | 2023/0085131 | PALLET COATING WASTE RECOVERY SYSTEM | Chemical engineering | AIR AND LIQUID SYSTEMS, LLC · patent 12,350,695 granted from it |
| Jun 18, 2020 | 2020/0188815 | ANIMAL BYPRODUCT RECOVERY SYSTEM | Chemical engineering | AIR AND LIQUID SYSTEMS, LLC · patent 10,780,374 granted from it |
| Aug 1, 2019 | 2019/0233316 | ANIMAL BYPRODUCT RECOVERY SYSTEM | Chemical engineering | AIR AND LIQUID SYSTEMS, LLC · patent 10,640,408 granted from it |
| Jul 12, 2018 | 2018/0193774 | FLOATING CHOPPER SLUDGE WEIR | Chemical engineering | AIR AND LIQUID SYSTEMS, LLC · patent 10,525,380 granted from it |
| Aug 14, 2014 | 2014/0224360 | SUBMERSIBLE SUCTION BOX | Chemical engineering | Air and Liquid Systems, Inc. |
| Sep 6, 2012 | 2012/0225761 | FORGED ROLL MEETING THE REQUIREMENTS OF THE COLD ROLLING INDUSTRY AND A METHOD FOR PRODUCTION OF SUCH A ROLL | Materials, metallurgy | Åkers AB · patent 8,920,296 granted from it |
What it applied for, 2024 to 2025: Chemical engineering 1.
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.