{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9778238","patent":{"patent_number":"US-9778238","title":"Resonant CO2 sensing with mitigation of cross-sensitivities","assignee":null,"inventors":[],"filing_date":"2014-09-09T00:00:00.000Z","publication_date":"2017-10-03T00:00:00.000Z","cpc_codes":["G01N","G01N","G01N","G01N","G01N","G01N","G01N","G01N","G01N","G01N","G01N","G01N","G01N","G01N"],"num_claims":9,"abstract":"Various exemplary embodiments relate to a device to measure carbon dioxide (CO2) levels, including a first oscillator group comprising a first sensor to measure air pressure, where the first sensor comprises a first sealed membrane, and where the first sealed membrane overlays a sealed first cavity; a second oscillator group including a second sensor to measure the resonance frequency of a second unsealed oscillating membrane, and where the second unsealed membrane overlays a second cavity in contact with the air outside of the second sensor; and a mixer accepting as input a first frequency measurement output from the first oscillator group and a second frequency measurement output from the second oscillator group, outputting the difference of the first frequency measurement and the second frequency measurement, and computing a carbon dioxide measurement based on the difference."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Resonant CO2 sensing with mitigation of cross-sensitivities","description":"Various exemplary embodiments relate to a device to measure carbon dioxide (CO2) levels, including a first oscillator group comprising a first sensor to measure air pressure, where the first sensor co","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9778238","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-9778238","citation_suggestion":"Patentable. \"Resonant CO2 sensing with mitigation of cross-sensitivities\" (US-9778238). https://patentable.app/patents/US-9778238","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9778238","json":"https://patentable.app/api/llm-context/US-9778238","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T05:15:22.371Z"}