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Inventor

Qianwen Cheng

Inventor
Shanghai, CN

Overview

9→
Patents
2006–2015
Patent span
Performing operations
Primary field (CPC B)

Patents· 9 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C07Cprimary
C07CAcyclic or carbocyclic compounds33%
B01DSeparation29%
Y02PClimate change mitigation technologies in the production or processing of goods29%
B29BPreparation or pretreatment of the material to be shaped5%
B29KIndexing scheme associated with subclasses b29b, b29c or b29d, relating to moulding materials or to materials for moulds, reinforcements, fillers or preformed parts, e.g. inserts5%
PatentTitleYear
9,029,603'Process for preparing alkylated p-phenylenediamines'20158,686,188'Process for preparing 4-aminodiphenylamine'20148,486,223'Falling film evaporator'20138,349,230'Spherical rubber chemicals and the method for preparing the same'20138,293,673'Process for preparing 4-aminodiphenylamine'20127,989,662'Process for preparing 4-aminodiphenylamine'20117,235,694'Process for preparing 4-aminodiphenylamine'20077,176,333'Process for preparing 4-aminodiphenylamine'20077,084,302'Process for preparing 4-aminodiphenylamine'2006

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2006Based in Qingdao City, Shandong Province, CN· patent location history
2007–2012Based in Cao County, CN· patent location history
2011–2015Patents assigned to JIANGSU SINORGCHEM TECH CO LTD (6)· patent assignee history
2011–2015Based in Shanghai, CN· patent location history
2012–2015Patents assigned to CHENG QIANWEN (5)· patent assignee history
2012–2015Patents assigned to FENG XIAOGEN (5)· patent assignee history
2012–2015Patents assigned to MAO XIAOHUI (5)· patent assignee history
2012–2015Patents assigned to WANG NONGYUE (5)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
JIANGSU SINORGCHEM TECH CO LTD62011–2015
CHENG QIANWENself52012–2015
FENG XIAOGEN52012–2015
MAO XIAOHUI52012–2015
WANG NONGYUE52012–2015
Locations
LocationPatentsSpan
Shanghai, CN52011–2015
Cao County, CN32007–2012
Qingdao City, Shandong Province, CN12006