Thiophosphoric acid products for antiwear additives
US11958875B1 · kind B1 · utility
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50References
20Claims
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Key dates
| Filing date | Mar 31, 2023 |
| Grant date | Apr 16, 2024 |
| Priority date | — |
| Expiry date | Mar 31, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2030/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A mixture including a thiophosphoric acid product suitable for preparing organometallic and/or ashless antiwear additives having improved copper corrosion performance. The thiophosphoric acid product is distilled and recovered as a condensate of the distillation and having a low level of active sulfur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.