{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11988657","patent":{"patent_number":"US-11988657","title":"Method for determining degree of sludge generation in oil","assignee":null,"inventors":[],"filing_date":"2019-09-19T00:00:00.000Z","publication_date":"2024-05-21T00:00:00.000Z","cpc_codes":["G01N","G01N"],"num_claims":4,"abstract":"A method for determining the degree of sludge generation in oil includes: a deteriorated oil generating step ST1; a RPVOT testing step ST2; a sludge amount measuring step ST2B; and a determining step ST3. The step ST1 generates deteriorated oil oxidized by immersing and rotating a pressurized container in a thermostatic bath having a predetermined temperature. The pressurized container is pressurized until the oxygen partial pressure reaches a predetermined pressure higher than the value under atmospheric pressure by adding oil and a copper catalyst, substituting with oxygen, or injecting oxygen or air. The step ST2A measures an RPVOT residual ratio of a portion of generated deteriorated oil by the RPVOT test. The step ST2B measures the amount of sludge for a portion of generated deteriorated oil. The step ST3 determines the ease of sludge generation from the relationship between the measured RPVOT residual ratio and the amount of sludge."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method for determining degree of sludge generation in oil","description":"A method for determining the degree of sludge generation in oil includes: a deteriorated oil generating step ST1; a RPVOT testing step ST2; a sludge amount measuring step ST2B; and a determining step ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11988657","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-11988657","citation_suggestion":"Patentable. \"Method for determining degree of sludge generation in oil\" (US-11988657). https://patentable.app/patents/US-11988657","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11988657","json":"https://patentable.app/api/llm-context/US-11988657","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T20:29:56.538Z"}