{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11474091","patent":{"patent_number":"US-11474091","title":"Color chart, test kit, and method of estimating chemical oxygen demand of water","assignee":null,"inventors":[],"filing_date":"2019-05-29T00:00:00.000Z","publication_date":"2022-10-18T00:00:00.000Z","cpc_codes":["G01N","G01N","G01N","G01N"],"num_claims":5,"abstract":"The present disclosure provides a color chart and a test kit for estimating chemical oxygen demand of water. The color chart includes a blue component, an indigo component, an umber component, and an orange component. The test kit includes an oxidant, a reductant, an indicator, and the color chart. The present disclosure also provides a method for estimating chemical oxygen demand of water. The method includes providing a water sample; adding an oxidant to the water sample; heating the water sample; adding a reductant to the water sample; adding an indicator to the water sample, such that the water sample develops a color; and matching the color of the water sample with the color components of the color chart to estimate the chemical oxygen demand of the water sample."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Color chart, test kit, and method of estimating chemical oxygen demand of water","description":"The present disclosure provides a color chart and a test kit for estimating chemical oxygen demand of water. The color chart includes a blue component, an indigo component, an umber component, and an ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11474091","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-11474091","citation_suggestion":"Patentable. \"Color chart, test kit, and method of estimating chemical oxygen demand of water\" (US-11474091). https://patentable.app/patents/US-11474091","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11474091","json":"https://patentable.app/api/llm-context/US-11474091","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T21:45:28.456Z"}