Inventor

Hongrui ZHANG

Inventor

Overview

2→

Patents

2023

Patent span

Chemistry

Primary field (CPC C)

Patents· 2 as inventor

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

C08Gprimary

C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds22%

B29BPreparation or pretreatment of the material to be shaped11%

B29CShaping or joining of plastics11%

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. inserts11%

C08LCompositions of macromolecular compounds11%

C09JAdhesives11%

E21BEarth or rock drilling11%

F04CRotary-piston, or oscillating-piston, positive-displacement machines for liquids11%

PatentTitleYear

11,673,297Molding method for producing a stator for a screw drilling tool using elastomer material2023 11,555,087Prepolymer of elastomer material for screw drilling tool and preparation method thereof2023

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2023Patents assigned to SHANGHAI PUJIA DRILLING TECH CO LTD (2)· patent assignee history

2023Based in CN· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SHANGHAI PUJIA DRILLING TECH CO LTD	2	2023

Locations

Location	Patents	Span
CN	2	2023