Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2006-04-06
2010-06-29
Pyon, Harold Y (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S329500, C525S329700, C525S384000, C428S402000, C252S194000
Reexamination Certificate
active
07745537
ABSTRACT:
The present invention provides a particulate water absorbing agent for absorbent cores which is excellent in powder conveying property, and achieves sufficient absorption performances for use in absorbent cores in particulate water absorbing agents including a water absorbing resin as a principal component, and which further is suitable for practical applications. In the present invention, characteristics that had not been known conventionally at all, i.e., “permeability potential under pressure (PPUP)” and “frictional charge being a positive charge” of the particulate water absorbing agent are regulated at a time, and furthermore, regulation of the “moisture content of 2 to 10% by weight” is perfected. Also, the particulate water absorbing agent including (A) a water-swelling crosslinked polymer having a constitutional unit derived from an unsaturated monomer containing an acid group and/or a salt thereof; and (B) water fulfills certain requirements.
REFERENCES:
patent: 4093776 (1978-06-01), Aoki et al.
patent: 4286082 (1981-08-01), Tsubakimoto et al.
patent: 4367323 (1983-01-01), Kitamura et al.
patent: 4446261 (1984-05-01), Yamasaki et al.
patent: 4625001 (1986-11-01), Tsubakimoto et al.
patent: 4683274 (1987-07-01), Nakamura et al.
patent: RE32649 (1988-04-01), Brandt et al.
patent: 4755562 (1988-07-01), Alexander et al.
patent: 4824901 (1989-04-01), Alexander et al.
patent: 4873299 (1989-10-01), Nowakowsky et al.
patent: 4973632 (1990-11-01), Nagasuna et al.
patent: 4985518 (1991-01-01), Alexander et al.
patent: 5124416 (1992-06-01), Haruna et al.
patent: 5140076 (1992-08-01), Hatsuda et al.
patent: 5145906 (1992-09-01), Chambers et al.
patent: 5244735 (1993-09-01), Kimura et al.
patent: 5250640 (1993-10-01), Irie et al.
patent: 5264495 (1993-11-01), Irie et al.
patent: 5380808 (1995-01-01), Sumiya et al.
patent: 5409771 (1995-04-01), Dahmen et al.
patent: 5744564 (1998-04-01), Stanley, Jr. et al.
patent: 6043311 (2000-03-01), Houben et al.
patent: 6071976 (2000-06-01), Dairoku et al.
patent: 6110992 (2000-08-01), Wada et al.
patent: 6228930 (2001-05-01), Dairoku et al.
patent: 6254990 (2001-07-01), Ishizaki et al.
patent: 6265488 (2001-07-01), Fujino et al.
patent: 6323252 (2001-11-01), Gartner et al.
patent: 6335406 (2002-01-01), Nagasuna et al.
patent: 6414214 (2002-07-01), Engelhardt et al.
patent: 6469080 (2002-10-01), Miyake et al.
patent: 6472478 (2002-10-01), Funk et al.
patent: 6503978 (2003-01-01), Tsao et al.
patent: 6605673 (2003-08-01), Mertens et al.
patent: 6620889 (2003-09-01), Mertens et al.
patent: 7312278 (2007-12-01), Nakashima et al.
patent: 2004/0048955 (2004-03-01), Wada et al.
patent: 2004/0071966 (2004-04-01), Inger et al.
patent: 2005/0020780 (2005-01-01), Inger et al.
patent: 2433044 (2002-07-01), None
patent: 1059153 (1992-03-01), None
patent: 0811636 (1997-12-01), None
patent: 0955086 (1999-11-01), None
patent: 1352927 (2003-10-01), None
patent: 1419755 (2004-05-01), None
patent: 1516884 (2005-03-01), None
patent: 0922717 (2007-09-01), None
patent: 9124879 (1997-05-01), None
patent: 2002539281 (2002-11-01), None
patent: 200418565 (2004-01-01), None
patent: 2004517173 (2004-06-01), None
patent: 9305080 (1993-03-01), None
patent: 9505856 (1995-03-01), None
patent: WO02/100451 (2002-12-01), None
patent: 03104349 (2003-05-01), None
patent: 2004069404 (2004-08-01), None
patent: 2004069915 (2004-08-01), None
patent: 2004069936 (2004-08-01), None
patent: 2005010102 (2005-02-01), None
The Rising Materials of Sanitary—Napkins and Paper Diapers, 1994, and partial English translation of col. 3 of document.
Nakashima Yasuhisa
Takaai Toshihiro
Wada Katsuyuki
Ahvazi Bijan
Nippon Shokubai Co. , Ltd.
Pyon Harold Y
Roylance Abrams Berdo & Goodman L.L.P.
LandOfFree
Particulate water absorbing agent, water-absorbent core and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Particulate water absorbing agent, water-absorbent core and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Particulate water absorbing agent, water-absorbent core and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4157360