Zhuangdou Zhang

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Shangqiu City, CN

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Patents Grantslast 30 patents

Information Patent Grant
Tannery process with effluent recycling
- Patent number 11,040,890
- Issue date Jun 22, 2021
- Zhuangdou Zhang
- C14 - SKINS HIDES PELTS LEATHER
Information Patent Grant
Tannery process with effluent recycling
- Patent number 10,501,336
- Issue date Dec 10, 2019
- Zhuangdou Zhang
- C14 - SKINS HIDES PELTS LEATHER
Information Patent Grant
Leather production using waste liquids
- Patent number 10,260,115
- Issue date Apr 16, 2019
- Zhuangdou Zhang
- C14 - SKINS HIDES PELTS LEATHER
Information Patent Grant
Tannery process with effluent recycling
- Patent number 9,776,887
- Issue date Oct 3, 2017
- Zhuangdou Zhang
- C14 - SKINS HIDES PELTS LEATHER

Patents Applicationslast 30 patents

Information Patent Application
Tannery Process With Effluent Recycling
- Publication number 20200115253
- Publication date Apr 16, 2020
- Zhuangdou Zhang
- C14 - SKINS HIDES PELTS LEATHER
Information Patent Application
Tannery Process With Effluent Recycling
- Publication number 20180127285
- Publication date May 10, 2018
- Zhuangdou Zhang
- C14 - SKINS HIDES PELTS LEATHER
Information Patent Application
Leather Production Using Waste Liquids
- Publication number 20170233833
- Publication date Aug 17, 2017
- Zhuangdou Zhang
- C14 - SKINS HIDES PELTS LEATHER
Information Patent Application
Tanning Process With Reduced Waste Discharge
- Publication number 20160186275
- Publication date Jun 30, 2016
- Zhuangdou Zhang
- C14 - SKINS HIDES PELTS LEATHER
Information Patent Application
Tannery Process With Effluent Recycling
- Publication number 20150176094
- Publication date Jun 25, 2015
- Zhuangdou Zhang
- C14 - SKINS HIDES PELTS LEATHER