Water-soluble or water-swellable polymers as water loss reducers in cement slurries

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11447682
APP PUB NO 20200270506A1
SERIAL NO

15931339

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

This invention relates to water-soluble or water-swellable polymers, containing a) 25-35 mol. % of one or more recurrent structural units of formula (1), where R1 and R2 represent hydrogen, methyl or ethyl, A represents a linear or branched C1-C12-alkylene, and Q+ stands for NH4+, Li+, Na+, K+, ½ Ca++, ½ Mg++, ½ Zn++, ⅓ Al+++, or organic ammonium ions of the formula [HNR5R6R7]+, b) 3 to 8 mol. % of one or more recurrent structural units of formula (2), where R1 represents hydrogen, methyl, or ethyl, X+ stands for H+, NH4+, Li+, Na+, K+, ½ Ca++, ½ Mg++, ½ Zn++, ⅓ Al+++, or organic ammonium ions of the formula [HNR5R6R7]+, B is a linear or branched alkylene group with 1 to 6 carbon atoms, and n is a whole number between 0 and 5, and c) 57 to 72 mol. % of a (meth)acrylamide.

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

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
DORF KETAL ENERGY SERVICES LLC1575 SAWDUST RD SUITE 330 THE WOODLANDS TX 77380

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Diemel, Claudia Gelnhausen, DE 6 43
Fischer, Dirk Hahnheim, DE 61 534
Kayser, Christoph Mainz, DE 33 376
Schäfer, Michael Gründau-Rothenbergen, DE 60 267
Tonhauser, Jürgen Oestrich-Winkel, DE 2 18

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 Mar 20, 2026
7.5 Year Payment $3600.00 $1800.00 $900.00 Mar 20, 2030
11.5 Year Payment $7400.00 $3700.00 $1850.00 Mar 20, 2034
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