Lei Li

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Multi-branched mannich base corrosion inhibitor and preparation met...
- Patent number 9,493,399
- Issue date Nov 15, 2016
- PetroChina Company Limited
- Ling Ma
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Mannich-base inhibitor for decalcification, preparation method and...
- Patent number 9,399,735
- Issue date Jul 26, 2016
- PetroChina Company Limited
- Ling Ma
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...

Patents Applicationslast 30 patents

Information Patent Application
ANTI-CORROSIVE, WEAR RESISTANT AND ANTI-UV COATING FOR THERMAL TRAN...
- Publication number 20160046835
- Publication date Feb 18, 2016
- UCDISPLAY, LLC
- Yanqiang Ye
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
A MULTI-BRANCHED MANNICH BASE CORROSION INHIBITOR AND PREPARATION M...
- Publication number 20140296575
- Publication date Oct 2, 2014
- Petrochina Company Limited
- Ling Ma
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
MANNICH-BASE INHIBITOR FOR DECALCIFICATION, PREPARATION METHOD AND...
- Publication number 20130256602
- Publication date Oct 3, 2013
- Petrochina Company Limited
- Ling Ma
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...