Diamond particles with multilayer hard coatings and polycrystalline diamond making therefrom
US-2026078289-A1 · Mar 19, 2026 · US
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China Nat Petroleum Corp — Chemistry & Metallurgy
China Nat Petroleum Corp holds 87 patents in Chemistry & Metallurgy, with representative filings summarized below.
| Metric | Value |
|---|---|
| Company | China Nat Petroleum Corp |
| Technology | Chemistry & Metallurgy |
| Patents in slice | 87 |
| Recent patents in slice | 74 |
| First year | 2015 |
| Last year | 2026 |
Representative patents
Notable publications linking China Nat Petroleum Corp to Chemistry & Metallurgy.
Di-alkyl chain surfactants as a main surfactant for enhancing oil recovery for tight oil formations
US-12565618-B2 · Mar 3, 2026 · US
Di-alkyl chain surfactants as a main surfactant for enhancing oil recovery for tight oil formations
US-12565618-B2 · Mar 3, 2026 · US
High-strength Portland cement slurry for ultra-high temperature cementing, preparation method therefor and application thereof
US-12497331-B2 · Dec 16, 2025 · US
High-strength Portland cement slurry for ultra-high temperature cementing, preparation method therefor and application thereof
US-12497331-B2 · Dec 16, 2025 · US
Recent filings
Latest patents from China Nat Petroleum Corp in Chemistry & Metallurgy.
Diamond particles with multilayer hard coatings and polycrystalline diamond making therefrom
US-2026078289-A1 · Mar 19, 2026 · US
Di-alkyl chain surfactants as a main surfactant for enhancing oil recovery for tight oil formations
US-12565618-B2 · Mar 3, 2026 · US
Di-alkyl chain surfactants as a main surfactant for enhancing oil recovery for tight oil formations
US-12565618-B2 · Mar 3, 2026 · US
High-strength Portland cement slurry for ultra-high temperature cementing, preparation method therefor and application thereof
US-12497331-B2 · Dec 16, 2025 · US
High-strength Portland cement slurry for ultra-high temperature cementing, preparation method therefor and application thereof
US-12497331-B2 · Dec 16, 2025 · US
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