Patents Currently in Force (13)
2 invention patents and 11 utility models; every number can be verified on CNIPA databases.
| Patent title | Patent No. | Type | Grant date | Related product |
|---|---|---|---|---|
| High-precision pyramid demisting mesh | ZL202321082168.2 | Utility model | 2023-09-15 | Pyramid demisting mesh |
| Adjustable filter mesh | ZL202522181105.8 | Utility model | 2026-09-04 | Adjustable filter mesh |
| High-efficiency filter mesh | ZL202522081862.8 | Utility model | 2026-08-21 | High-efficiency filter mesh |
| Multi-level adjustable packing structure | ZL202421187720.9 | Utility model | 2025-01-14 | Packing support (tower internals) |
| Oil-mist treatment filter based on condensation | ZL202421047303.4 | Utility model | 2024-12-27 | Condensing oil-mist filter |
| Box-type air filter | ZL202420966573.9 | Utility model | 2024-12-20 | Box-type air filter |
| Herringbone S-type honeycomb filter mesh | ZL202320753765.7 | Utility model | 2023-08-15 | Honeycomb filter mesh |
| Co-current corrugated structured packing device | ZL202320753764.2 | Utility model | 2023-08-15 | Structured packing |
| Oil-mist filter (quick-release cartridge) | ZL202223464769.8 | Utility model | 2023-05-05 | Oil-mist filter |
| Stainless wire-mesh corrugated demister | ZL202220326083.3 | Utility model | 2022-06-14 | Wire-mesh demister |
| Honeycomb oil-mist filter mesh | ZL202021688366.X | Utility model | 2021-04-20 | Honeycomb oil-mist mesh |
| Flat integrated filter bag | ZL201811593121.6 | Invention | 2021-06-15 | Liquid filter bag |
| High-efficiency flow-guiding filter | ZL201811593122.0 | Invention | 2021-02-05 | Liquid flow-guiding filtration |
Pending applications
One invention patent is under substantive examination.
| Patent title | Application No. | Type | Status | Related product |
|---|---|---|---|---|
| Elevating filter for separating solids from air | CN202510315059.8 | Invention | Under substantive examination (filed 2025-03-18) | Elevating filter |
Scope & verification
Counting scope, lookup path and official certificates.
Scope: the table above lists the 13 patents currently in force. Another 18 earlier utility models lapsed due to unpaid annuities (the latest batch expired between March and July 2026); historical records remain searchable on CNIPA.
Verification: search any patent number in the CNIPA Patent Search & Analysis system (pss-system.cponline.cnipa.gov.cn) or on Google Patents to check legal status and the full specification.
Note: compiled from public patent data as of 2026-09-21. For officially sealed patent register certificates or legal-status certificates (commonly required in tenders and vendor onboarding), contact us and we will arrange them.
Need patent backup or selection support?
Patent certificate copies and legal-status certificates are available on request, together with quotations and tender documents.