Assignee
UNIV NORTH CHINA
CN·67 granted patents·27 pending applications·46 citations·filing 2014–2025
Top patents by PatentIndex Score
94 records- 0193US11732112B1Method of preparing graphene/natural rubber composite with enhanced mechanical properties, thermal conductivity, and wear resistanceUNIV NORTH CHINA·Filed 2022·Granted Aug 22, 2023·4 cites·8 claims
- 0292US11970427B2Microelement amino acid chelate-urea formaldehyde slow-release fertilizer and method for preparing the same by reactive extrusionUNIV NORTH CHINA·Filed 2023·Granted Apr 30, 2024·2 cites·10 claims
- 0391US11597810B2Equipment and method for continuously preparing graphene powder directly dispersed in organic systemUNIV NORTH CHINA·Filed 2022·Granted Mar 7, 2023·1 cites·9 claims
- 0490US9561547B1Deep hole machining on-line deviating correction device based on laser detectionUNIV NORTH CHINA·Filed 2015·Granted Feb 7, 2017·10 cites·6 claims
- 0588US12360083B1Method and system for measuring burning rate of propellant based on multi-channel ultrasonic wavesUNIV NORTH CHINA·Filed 2025·Granted Jul 15, 2025·1 cites·9 claims
- 0687US11678826B2Magnetometer used for cardiac magnetic field measurement and based on nitrogen-vacancy (NV) centers in diamond, and cardiac magnetic field measurement systemUNIV NORTH CHINA·Filed 2021·Granted Jun 20, 2023·2 cites·10 claims
- 0785US11614464B2System for simultaneously and microscopically measuring vapor cell coating film energy transfer and relaxation characteristics at nanometer scalesUNIV NORTH CHINA·Filed 2021·Granted Mar 28, 2023·2 cites·8 claims
- 0883US9630260B1Rear-mounted deep hole machining on-line detection and deviating correction deviceUNIV NORTH CHINA·Filed 2015·Granted Apr 25, 2017·10 cites·6 claims
- 0980US11656259B1System and method of measuring the frequency of a radio frequency signalUNIV NORTH CHINA·Filed 2022·Granted May 23, 2023·1 cites·20 claims
- 1080US10265746B2Rotary extrusion producing method for producing inner ring rib with large aspect ratio formed of hollow billetUNIV NORTH CHINA·Filed 2017·Granted Apr 23, 2019·3 cites·1 claims
- 1179US10865161B2Water-absorbing and water-retaining multi-nutrient biodegradable polymeric slow/controlled release fertilizer having a semi-interpenetrating network structureUNIV NORTH CHINA·Filed 2018·Granted Dec 15, 2020·1 cites·11 claims
- 1277US10906843B2Extrusion granulated urea-formaldehyde-based multi-nutrient slow/controlled release fertilizer and preparation method thereofUNIV NORTH CHINA·Filed 2018·Granted Feb 2, 2021·2 cites·5 claims
- 1376US11287459B2Magnetic photoacoustic composite non destructive testing device of power transmission line of photovoltaic grid based on corona effectUNIV NORTH CHINA·Filed 2020·Granted Mar 29, 2022·2 cites·7 claims
- 1475US10265747B2Rotary extrusion producing mold for producing inner ring rib with large aspect ratio formed of hollow billetUNIV NORTH CHINA·Filed 2017·Granted Apr 23, 2019·2 cites·1 claims
- 1574US12434211B2Efficient and cost-effective method for preparing ultra-fine powdered natural rubber masterbatch with high graphene content and use thereofUNIV NORTH CHINA·Filed 2023·Granted Oct 7, 2025·0 cites·10 claims
- 1674US2026001968A1Method for preparing heavy-duty tire with natural rubber modified by graphene/carbon blacks varying in particle size synergized with vulcanization systemUNIV NORTH CHINA·Filed 2025·Application pending·0 cites
- 1771US10814370B2Special-purpose die for shaping aluminum-magnesium alloy by rotating extrusionUNIV NORTH CHINA·Filed 2018·Granted Oct 27, 2020·1 cites·5 claims
- 1871US2025387986A1Method for manufacturing resin matrix composite part by near-net-shape molding of short-cut fiber prepregUNIV NORTH CHINA·Filed 2025·Application pending·0 cites
- 1970US10661382B2SLM forming device for multiple metal powder materialsUNIV NORTH CHINA·Filed 2017·Granted May 26, 2020·2 cites·7 claims
- 2069US12110230B2Efficient microwave preparation method with one-step simultaneous reduction/embedding and application of metal monatomic-doped reduced graphene oxide dielectric materialUNIV NORTH CHINA·Filed 2024·Granted Oct 8, 2024·0 cites·4 claims
- 2169US2025387999A1Impact-resistant and wave-absorbing resin matrix composite metamaterial based on chopped carbon fiber felt and a preparation method thereofUNIV NORTH CHINA·Filed 2025·Application pending·0 cites
- 2267US12337582B2High-velocity impact-resistant wave-transparent composite with bio-inspired nacre-like interlaminar toughening structure, and preparation method thereofUNIV NORTH CHINA·Filed 2024·Granted Jun 24, 2025·0 cites·9 claims
- 2367US12098253B2Method for preparing thermoplastic starch by in-situ reactive extrusion plasticization process and method for preparing starch/polymer blend by in-situ reactive extrusion plasticization and compatibilization processUNIV NORTH CHINA·Filed 2022·Granted Sep 24, 2024·0 cites·4 claims
- 2467US2024132676A1Sulfonated lignin as a by-product of papermaking wood pulp/urea-formaldehyde fertilizer and method for preparing the same by a reactive extrusion and granulation processUNIV NORTH CHINA·Filed 2023·Application pending·0 cites
- 2566US12325224B2Lightweight, low-thickness, durable and reliable multi-band radar stealth-bulletproof integrated metamaterialUNIV NORTH CHINA·Filed 2024·Granted Jun 10, 2025·0 cites·9 claims
- 2665US2025340704A1Method for preparing dually-bonded graphene oxide/natural rubber composite based on high-molecular-weight cationic polymerUNIV NORTH CHINA·Filed 2025·Application pending·0 cites
- 2764US12180125B2Method for preparing weathered coal-derived humic acid/urea-formaldehyde slow-release fertilizer granules by reactive extrusion process with depolymerization-activation-polycondensation trinity and fertilization methodUNIV NORTH CHINA·Filed 2024·Granted Dec 31, 2024·0 cites·3 claims
- 2864US2026015471A1Method for preparing controllably cross-linked graphene-modified natural rubber based on aqueous phase synergistic aggregating precipitating processUNIV NORTH CHINA·Filed 2025·Application pending·0 cites
- 2963US12428354B2Method for preparing nitrogen-rich or nutritious slow-release fertilizer through in-situ straw modification/reactive extrusion integrated continuous processUNIV NORTH CHINA·Filed 2022·Granted Sep 30, 2025·0 cites·11 claims
- 3062US12359037B2Vulcanizing agent-modified graphene prepared through an in-situ chemical deposition process, and controllable crosslinked natural rubber composite comprising the sameUNIV NORTH CHINA·Filed 2022·Granted Jul 15, 2025·0 cites·6 claims
- 3162US2025025967A1Device for controlling quality of wire arc additive forming through feedback of acoustic emissionUNIV NORTH CHINA·Filed 2024·Application pending·0 cites
- 3262US2025025941A1Online monitoring device for internal defects in metal selective laser meltingUNIV NORTH CHINA·Filed 2024·Application pending·0 cites
- 3360US12072231B1Apparatus and method for real-time in-situ simultaneous measurement of temperature and mechanical parametersUNIV NORTH CHINA·Filed 2024·Granted Aug 27, 2024·0 cites·4 claims
- 3459US12468068B2Carbon-based conductive film-based ultralight wide-angle absorbing metamaterial with full-frequency absorption within 2-18 GHz and preparation method thereofUNIV NORTH CHINA·Filed 2025·Granted Nov 11, 2025·0 cites·4 claims
- 3559US12422310B2Manufacturing method for a surface acoustic wave temperature sensorUNIV NORTH CHINA·Filed 2022·Granted Sep 23, 2025·0 cites·6 claims
- 3659US11745402B2High-precision and high-efficiency injection mold for high-aspect-ratio double-layer cylindrical plastic part and molding method using the sameUNIV NORTH CHINA·Filed 2023·Granted Sep 5, 2023·0 cites·9 claims
- 3759US10844461B2Method for manufacturing quasicrystal and alumina mixed particulate reinforced magnesium-based composite materialUNIV NORTH CHINA·Filed 2018·Granted Nov 24, 2020·0 cites·6 claims
- 3859US2022250997A1Highly efficient and environment-friendly reactive extrusion integrated continuous preparation process for a biodegradable polymeric multi-nutrient nano slow/controlled-release fertilizerUNIV NORTH CHINA·Filed 2021·Application pending·0 cites
- 3959US2024002556A1High wear-resistant graphene-modified natural rubber and preparation thereofUNIV NORTH CHINA·Filed 2022·Application pending·0 cites
- 4059US2023123541A1Biodegradable urea-formaldehyde-based sand-fixing polymer material with slow nutrient release and water absorption and retentionUNIV NORTH CHINA·Filed 2022·Application pending·0 cites
- 4158US12342519B2Lightweight absorption-transmission integrated metamaterial to electromagnetic waves with polarization stability and wide-incident-angle stability, and preparation method thereofUNIV NORTH CHINA·Filed 2025·Granted Jun 24, 2025·0 cites·6 claims
- 4258US12276837B2Double-parameter in-situ sensor based on waveguide grating, a sensing system and a preparation methodUNIV NORTH CHINA·Filed 2023·Granted Apr 15, 2025·0 cites·9 claims
- 4358US11622483B2Gradient electrically conductive-uniform thermally conductive dual network structure-based electromagnetic shielding polymer composite with low reflection and high absorptionUNIV NORTH CHINA·Filed 2021·Granted Apr 4, 2023·0 cites·9 claims
- 4457US12486204B2Device and method for industrialized continuous and simplified preparation of urea-formaldehyde slow-release nitrogen fertilizer or urea-formaldehyde-based slow- and controlled-release multi-nutrient fertilizerUNIV NORTH CHINA·Filed 2022·Granted Dec 2, 2025·0 cites·12 claims
- 4557US11732078B2Preparation of urea-formaldehyde/poly(butylene succinate) and its ternary biodegradable polymer nano slow/controlled release materials by reactive extrusionUNIV NORTH CHINA·Filed 2020·Granted Aug 22, 2023·0 cites·8 claims
- 4657US2025340721A1System and method for preparing graphene oxide (go)-modified natural rubber masterbatch by aqueous phase synergistic aggregating co-coagulation processUNIV NORTH CHINA·Filed 2025·Application pending·0 cites
- 4757US2024409129A1Operation method and operation system for upper and lower double-duct jet-propelled pipeline ultra-high speed flying vehicleUNIV NORTH CHINA·Filed 2024·Application pending·0 cites
- 4857US2025359483A1Polymer-derived ceramic thin film thermocouple and preparation method thereofUNIV NORTH CHINA·Filed 2025·Application pending·0 cites
- 4956US12443777B2Optimizing method for molding process of fiber-reinforced polymer composite partsUNIV NORTH CHINA·Filed 2024·Granted Oct 14, 2025·0 cites·7 claims
- 5056US11813653B2Method for preparing large-size rare earth magnesium alloy high-performance ingots by short process severe plastic deformationUNIV NORTH CHINA·Filed 2022·Granted Nov 14, 2023·0 cites·5 claims
Showing the top 50 of 94 patent records by PatentIndex Score.
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