Rotary mold extrusion molding process of screw pump rotor

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11731180
APP PUB NO 20230211398A1
SERIAL NO

17640356

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

The present disclosure relates to the field of screw pump technologies, and in particular to a rotary mold extrusion molding process of a screw pump rotor. The rotary mold extrusion molding process of a screw pump rotor includes: performing isothermal spheroidizing annealing for a metal embryo material after treating the metal embryo material ultrasonically for 8˜30 s; performing cylindrical turning for the annealed metal embryo material and then performing sand-blasting, and soaking the metal embryo material in saponified oil for 10˜30 min for lubrication treatment, where the saponified oil contains a nano-silicon carbide of 0.5%˜8% which is a nano-silicon carbide mixture with particle sizes of 20˜60 nm and 140˜200 nm with a mixed weight ratio of 1:(2.8˜4); at room temperature, placing the metal embryo material into an extrusion cylinder to perform rotary mold extrusion molding so as to obtain a finished product.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
ZHEJIANG OCEAN UNIVERSITY316022 NO 1 HAIDA SOUTH ROAD LINCHENG STREET DINGHAI DISTRICT ZHOUSHAN ZHEJIANG ZHOUSHAN CITY ZHEJIANG PROVINCE 316022

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ding, Bo Zhoushan, CN 32 152
Tao, Hengcong Zhoushan, CN 3 0
Zhang, Le Zhoushan, CN 145 572
Zhu, Baikang Zhoushan, CN 2 0

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
3.5 Year Payment $1600.00 $800.00 $400.00 Feb 22, 2027
7.5 Year Payment $3600.00 $1800.00 $900.00 Feb 22, 2031
11.5 Year Payment $7400.00 $3700.00 $1850.00 Feb 22, 2035
Fee Large entity fee small entity fee micro entity fee
Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00