Method for preparing low-background cement

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 12065378
APP PUB NO 20240018048A1
SERIAL NO

18197028

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

A method for preparing low-background cement includes: uniformly mixing a seed crystal of cement, C4AF whiskers, and high-magnesium raw material to yield a first mixture, calcining the first mixture at 1400-1500° C., to yield a low-background clinker, the first mixture including 1.0-5.0 wt. % of the seed crystal of cement, 1.0-5.0 wt. % of the C4AF whiskers, and the balance is the high-magnesium raw material; and grinding a second mixture of the low-background clinker and gypsum, to yield low-background cement. The seed crystal of cement is a high-magnesium and low hydration heat clinker, has a specific activity of Ra-226 radioactive nuclides within 50 Bq/kg, and the MgO content of the clinker is between 4.0 wt. % and 5.0 wt. %, with 50 wt. %≤C3S≤55.0 wt. %; and the high-magnesium raw material has a MgO content between 2.5 wt. % and 3.0 wt. %.

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

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
CHINA BUILDING MATERIALS ACADEMY CO LTDNO 1 GUANZHUANGDONGLI CHAOYANG DISTRICT BEIJING 100024

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bao, Tingting Beijing, CN 3 16
Gao, Xianshu Beijing, CN 3 2
Guo, Suihua Beijing, CN 1 0
Huang, Wen Beijing, CN 81 912
Liu, Ao Beijing, CN 21 9
Liu, Yun Beijing, CN 245 943
Ma, Zhongcheng Beijing, CN 2 4
Shen, Xin Beijing, CN 38 2603
Sun, Mingming Beijing, CN 39 64
Tang, Guanbao Beijing, CN 1 0
Wang, Jing Beijing, CN 1745 13464
Wang, Min Beijing, CN 957 5670
Wang, Xianbin Beijing, CN 85 512
Wen, Zhaijun Beijing, CN 5 2
Yao, Guang Beijing, CN 9 45
Yu, Yang Beijing, CN 361 2035
Zhang, Kunyue Beijing, 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 20, 2028
7.5 Year Payment $3600.00 $1800.00 $900.00 Feb 20, 2032
11.5 Year Payment $7400.00 $3700.00 $1850.00 Feb 20, 2036
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