Rolling bearing, pivot assembly bearing, and disk drive apparatus
US-2024417645-A1 · Dec 19, 2024 · US
Phosphate esters
Phosphate esters · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C10M137/04 |
| Official title | Phosphate esters |
| Display label | Phosphate esters |
| Total patents | 255 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 14 |
| 2016 | 15 |
| 2017 | 21 |
| 2018 | 22 |
| 2019 | 33 |
| 2020 | 24 |
| 2021 | 30 |
| 2022 | 30 |
| 2023 | 28 |
| 2024 | 19 |
| 2025 | 14 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Refrigeration oil, and composition for use in refrigerating machine
US-2018371355-A1 · Dec 27, 2018 · US
Compressor and refrigeration cycle device using same
US-10077922-B2 · Sep 18, 2018 · US
Working fluid composition for refrigerator, and refrigerator oil
US-10053647-B2 · Aug 21, 2018 · US
Ionic liquids containing symmetric quaternary phosphonium cations and phosphorus-containing anions, and their use as lubricant additives
US-2018208869-A1 · Jul 26, 2018 · US
Zinc-free lubricating composition
US-2018201862-A1 · Jul 19, 2018 · US
Axle oil composition having enhanced fuel efficiency and low viscosity
US-2018148661-A1 · May 31, 2018 · US
Conveyor lubricants including emulsions and methods employing them
US-2018127679-A1 · May 10, 2018 · US
Lubricant composition
US-2018119049-A1 · May 3, 2018 · US
Phosphorous-containing compounds and uses thereof
US-9944879-B2 · Apr 17, 2018 · US
Mixed phosphorus esters for lubricant applications
US-2017335224-A1 · Nov 23, 2017 · US
Lubricating oil composition for sliding glide surface
US-2017327762-A1 · Nov 16, 2017 · US
Grease compositions
US-2017321144-A1 · Nov 9, 2017 · US
Lubricant oil composition for compression refrigerator
US-9790449-B2 · Oct 17, 2017 · US
Conveyor lubricants including emulsion of a lipophilic compound and an emulsifier and/or an anionic surfactant and methods employing them
US-9783760-B2 · Oct 10, 2017 · US
Lubricating oil composition
US-2017247630-A1 · Aug 31, 2017 · US
Anti-corrosion additives
US-2017240836-A1 · Aug 24, 2017 · US
Polyfunctional lubricant composition
US-9738848-B2 · Aug 22, 2017 · US
Lubricating composition containing an antiwear agent
US-9738849-B2 · Aug 22, 2017 · US
Conveyor lubricants including emulsion of a lipophilic compound and an emulsifier and/or an anionic surfactant and methods employing them
US-2017218297-A1 · Aug 3, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C10M137/04?
- CPC C10M137/04 is the Cooperative Patent Classification code for “Phosphate esters.”
- How many patents are filed under CPC C10M137/04 (Phosphate esters)?
- Our database includes 255 publications tagged with this CPC code.
- Is patent activity under CPC C10M137/04 growing?
- Publication counts under this code: 19 in 2024 vs 14 in 2025 (latest complete years).