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.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →