Ashless additive composition
US-12331260-B2 · Jun 17, 2025 · US
Heterocyclic nitrogen compounds
Heterocyclic nitrogen compounds · 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 | C10M133/38 |
| Official title | Heterocyclic nitrogen compounds |
| Display label | Heterocyclic nitrogen compounds |
| Total patents | 39 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 6 |
| 2017 | 6 |
| 2018 | 7 |
| 2019 | 3 |
| 2020 | 3 |
| 2022 | 1 |
| 2023 | 3 |
| 2024 | 5 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Benzazepine compounds as antioxidants for lubricant compositions
US-12152216-B2 · Nov 26, 2024 · US
Oil-well metal pipe, and method for producing oil-well metal pipe
US-12104085-B2 · Oct 1, 2024 · US
Method of limiting chemical degradation due to nitrogen dioxide contamination
US-12006486-B2 · Jun 11, 2024 · US
Ashless additive composition
US-2024093115-A1 · Mar 21, 2024 · US
Benzazepine compounds as antioxidants for lubricant compositions
US-2024052256-A1 · Feb 15, 2024 · US
Oil-well metal pipe, and method for producing oil-well metal pipe
US-2023312946-A1 · Oct 5, 2023 · US
Soluble water scavenger molecules for use with dielectric fluids
US-2023265349-A1 · Aug 24, 2023 · US
Method of Limiting Chemical Degradation Due to Nitrogen Dioxide Contamination
US-2023139911-A1 · May 4, 2023 · US
Ashless additive composition
US-2022220410-A1 · Jul 14, 2022 · US
Cyclic quaternary ammonium salts as fuel or lubricant additives
US-10689589-B2 · Jun 23, 2020 · US
An aqueous coating agent composition and a coating composition for an aqueous lubricating film comprising the same
US-2020157379-A1 · May 21, 2020 · US
Hydride donors as an additive for reducing low speed pre-ignition events
US-2020109343-A1 · Apr 9, 2020 · US
Aqueous low friction coating for telecommunication cables
US-10443009-B2 · Oct 15, 2019 · US
Lubricating oil composition
US-2019112544-A1 · Apr 18, 2019 · US
Anticorrosive agent and terminal fitted electric wire
US-2019048283-A1 · Feb 14, 2019 · US
Refrigeration oil, and composition for use in refrigerating machine
US-2018371355-A1 · Dec 27, 2018 · US
Lubricating oil composition
US-10160927-B2 · Dec 25, 2018 · US
Aqueous low friction coating for telecommunication cables
US-2018298299-A1 · Oct 18, 2018 · US
Cyclen friction modifiers for boundary lubrication
US-10081776-B2 · Sep 25, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C10M133/38?
- CPC C10M133/38 is the Cooperative Patent Classification code for “Heterocyclic nitrogen compounds.”
- How many patents are filed under CPC C10M133/38 (Heterocyclic nitrogen compounds)?
- Our database includes 39 publications tagged with this CPC code.
- Is patent activity under CPC C10M133/38 growing?
- Publication counts under this code: 5 in 2024 vs 1 in 2025 (latest complete years).