Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2008-05-27
2008-05-27
Wyrozebski, Katarzyna (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C524S447000, C501S145000, C424S401000, C424S070100
Reexamination Certificate
active
10706752
ABSTRACT:
Concentrated suspensions of smectite clays are obtained as either relatively “thin” or highly shear-thinning slurries that are easy to pump, by adding one or more of certain cationic polymers whose weight average molecular weight, Mw, is 50,000 or higher. It was found during the course of the invention that a cationic polymer with an Mw of 10,000 did not work, while the same polymer with a bimodal Mw of 50,000 and 30,000 worked satisfactorily. To achieve the full advantage of the present invention, the cationic polymer preferably has 1 to 10 milliequivalents of cationic charge per gram of the polymer, and more preferably 5 to 10 milliequivalents of cationic charge per gram of the polymer, and most preferably 6 to 8 milliequivalents of cationic charge per gram of the polymer.
REFERENCES:
patent: 3711573 (1973-01-01), Nagy
patent: 4390033 (1983-06-01), Khalil et al.
patent: 4761249 (1988-08-01), Giede et al.
patent: 5089252 (1992-02-01), Grollier et al.
patent: 5112603 (1992-05-01), Nadolsky et al.
patent: 5171565 (1992-12-01), Akhtar et al.
patent: 5556547 (1996-09-01), Kajita
patent: 5575924 (1996-11-01), Bair et al.
patent: 5670435 (1997-09-01), Kajita
patent: 5721306 (1998-02-01), Tsipursky et al.
patent: 5843875 (1998-12-01), Wei et al.
patent: 6399690 (2002-06-01), Lan et al.
patent: 6500411 (2002-12-01), SenGupta et al.
patent: 6544500 (2003-04-01), O'Toole et al.
patent: 6712934 (2004-03-01), Ahlgren et al.
patent: 6939536 (2005-09-01), Chen et al.
patent: 2002/0182155 (2002-12-01), SenGupta et al.
patent: 2003/0108501 (2003-06-01), Hofrichter et al.
patent: 2003/0163877 (2003-09-01), Baker et al.
patent: 2004/0103483 (2004-06-01), Delplancke et al.
patent: 2005/0112074 (2005-05-01), Arai et al.
patent: 0559319 (1993-09-01), None
patent: 2364047 (2002-01-01), None
patent: WO 99/25312 (1999-05-01), None
patent: WO-0200557 (2002-01-01), None
Hawley's Condensed Chemical Dictionary. Fourteenth Edition. Lewis, Richard. Electronic Version, 2002. “bentonite” and “hectorite”.
PCT International Search Report dated Mar. 31, 2004 for International Application No. PCT/US03/36040.
Darlington, Jr. Jerald W.
Gould Jennifer
Lin Iiona
SenGupta Ashoke K.
AMCOL International Corp.
Marshall & Gerstein & Borun LLP
Wyrozebski Katarzyna
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