Martin Marietta Materials (MLM)
NYSE: MLM · Mining & Quarrying of Nonmetallic Minerals (No Fuels) · Raleigh, NC · filing with the SEC since 1996
Grade6.5
◀ Past 7.2● Present 6.7▶ Future 4.9
Patents
US patents through Dec 31, 2025 · PatentsView, from the USPTO’s Open Data Portal · read Oct 27, 202666 patents granted to the 9 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 Martin Marietta Materials’s names, not what it holds today.
Patents granted
66
65 utility, 1 reissue, 1976 to Dec 31, 2025
Granted in 2025
1
Against 2 in 2024 and none in 2023
Applications published
37
1 of them in 2025
Names they are printed under
9
its own name, a subsidiary
By yearGrantedApplications published
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
Environmental technology2
Computer technology1
Materials, metallurgy1
The main technology area of each patent, in the World Intellectual Property Organization’s 35 fields.
Under which name9 counted
Martin Marietta Materials, Inc. its own name
US, as the owner printed on each patent
19 published
Martin Marietta Magnesia Specialties, LLC a subsidiary
US, as the owner printed on each patent
0 published
PREMIER MAGNESIA, LLC a subsidiary
US, as the owner printed on each patent
4 published
Premier Magnesia, LLC a subsidiary
named as the applicant on its applications, in US
9 published
Martin Marietta Materials Southwest, Ltd. a subsidiary
US, as the owner printed on each patent
1 published
Tiller LLC a subsidiary
US, as the owner printed on each patent
1 published
Martin Marietta Magnesia Specialties, LLC a subsidiary
named as the applicant on its applications, in US
1 published
Martin Marietta, Inc. a subsidiary
named as the applicant on its applications, in US
1 published
Tiller LLC a subsidiary
named as the applicant on its applications, in US
1 published
Newest grantseach row opens the USPTO’s own copy
| Granted | Patent | Title | Field | Owner as printed |
|---|---|---|---|---|
| Sep 9, 2025 | 12,410,086 | Biosolids quality and dewaterability | Environmental technology | PREMIER MAGNESIA, LLC |
| Jun 18, 2024 | 12,012,361 | Geopolymer cement | Materials, metallurgy | PREMIER MAGNESIA, LLC |
| Apr 23, 2024 | 11,964,889 | Biosolids quality and dewaterability | Environmental technology | PREMIER MAGNESIA, LLC |
| Aug 24, 2021 | 11,099,721 | In-cell commands for matrix layout structured user interface | Computer technology | Tiller LLC |
| May 14, 2019 | 10,287,198 | Compositions and methods for treating wastewater | Environmental technology | PREMIER MAGNESIA, LLC |
| May 7, 2019 | 10,280,100 | Compositions and methods for treating wastewater | Environmental technology | PREMIER MAGNESIA, LLC |
| Dec 25, 2018 | 10,160,674 | Improving wastewater pumping and conveying efficiency | Environmental technology | PREMIER MAGNESIA, LLC |
| Nov 20, 2018 | 10,131,562 | Treatment of potable water | Environmental technology | PREMIER MAGNESIA, LLC |
| Feb 20, 2018 | 9,895,649 | High solids magnesium hydroxide sea water slurries | Environmental technology | PREMIER MAGNESIA, LLC |
| Feb 13, 2018 | 9,890,054 | Process for producing a stabilized magnesium hydroxide slurry | Basic materials chemistry | Martin Marietta Magnesia Specialties, LLC |
Newest applications publishedan application is a clue, never a plan
| Published | Application | Title | Field | Owner as printed |
|---|---|---|---|---|
| Mar 6, 2025 | 2025/0074807 | BIOSOLIDS QUALITY AND DEWATERABILITY | Environmental technology | Premier Magnesia, LLC · patent 12,410,086 granted from it |
| Jul 27, 2023 | 2023/0234893 | MOLD AND MILDEW RESISTANT WALLBOARD | Materials, metallurgy | Premier Magnesia, LLC |
| Aug 18, 2022 | 2022/0259089 | BIOSOLIDS QUALITY AND DEWATERABILITY | Environmental technology | Premier Magnesia, LLC |
| Aug 19, 2021 | 2021/0256624 | RESOURCE CONSUMPTION RATE AND CONSUMPTION LEVEL CONTROL SYSTEM | IT methods for management | Tiller LLC |
| Apr 8, 2021 | 2021/0101832 | GEOPOLYMER CEMENT | Materials, metallurgy | Premier Magnesia, LLC · patent 12,012,361 granted from it |
| Oct 3, 2019 | 2019/0302976 | IN-CELL COMMANDS FOR MATRIX LAYOUT STRUCTURED USER INTERFACE | Computer technology | Tiller LLC · patent 11,099,721 granted from it |
| Apr 5, 2018 | 2018/0093909 | ANAEROBIC DIGESTER ENHANCEMENT | Environmental technology | Premier Magnesia, LLC |
| Aug 10, 2017 | 2017/0225961 | PROCESS FOR PRODUCING A STABILIZED MAGNESIUM HYDROXIDE SLURRY | Basic materials chemistry | Martin Marietta Magnesia Specialties, LLC · patent 9,890,054 granted from it |
| Jan 12, 2017 | 2017/0008810 | METHODS FOR PRODUCING CONCRETE HAVING IMPROVED CRACK RESISTANCE | Materials, metallurgy | Premier Magnesia, LLC |
| Oct 20, 2016 | 2016/0304396 | MAGNESIUM-BASED CEMENTS AND SLURRY PRECURSORS FOR THE SAME | Materials, metallurgy | Premier Magnesia, LLC |
What it applied for, 2024 to 2025: Environmental technology 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.