Liquid purification or separation – Processes – Ion exchange or selective sorption
Reexamination Certificate
2011-04-12
2011-04-12
Barry, Chester T (Department: 1776)
Liquid purification or separation
Processes
Ion exchange or selective sorption
C210S692000, C210S693000, C210S925000
Reexamination Certificate
active
07922913
ABSTRACT:
A dry product that permanently removes oil and oil stains from liquid or dry surfaces and is environmentally safe. The dry product is formed by mixing efficacious proportions of untreated amorphous silica with a dry, inert organic, inorganic or synthetic carrier, or combinations of said carriers. Suitable inert carriers include, but are not limited to, (a) inert inorganic carriers including, but not limited to, clays, perlite, vermiculite, crushed glass, volcanic ash and sand; (b) inert organic carriers, including, but not limited to, peat moss, straw, hay, sawdust, ground corncobs, flours, and coconut coir, and (c) inert synthetic carriers, including, but not limited to, polyurethane, polyethylene and polypropylene. The dry product can be applied directly to oil stains either on a hard surface, such as concrete or asphalt, or to oil spills on water.
REFERENCES:
patent: 4670156 (1987-06-01), Grenthe
patent: 5009790 (1991-04-01), Bustamante et al.
patent: 5037557 (1991-08-01), Warrenchak et al.
patent: 5114593 (1992-05-01), Diaz
patent: 5135578 (1992-08-01), Billings
patent: 5135656 (1992-08-01), Means et al.
patent: 5244503 (1993-09-01), Fabian
patent: 5723424 (1998-03-01), Jennings
patent: 5795842 (1998-08-01), Sundquist
patent: 5951784 (1999-09-01), Hawes
patent: 6027652 (2000-02-01), Hondroulis et al.
patent: 6260511 (2001-07-01), Hsu
patent: 6391120 (2002-05-01), Silva
patent: 6416670 (2002-07-01), Cummings
patent: 6506307 (2003-01-01), Hondroulis et al.
patent: 6827792 (2004-12-01), Cervero et al.
patent: 7041221 (2006-05-01), Arnott
patent: 2005/0028839 (2005-02-01), MacQuoid
patent: 2006/0276361 (2006-12-01), Bullis et al.
patent: WO 2007/104955 (2007-09-01), None
“Health Effects of Occupational Exposure to Respirable Crystalline Silica”; NIOSH Hazard Review; Chapter 1, pp. 1-4.
W.R. Grace; “Participated Silica”; 2 pages.
Barry Chester T
Chambers Guy W.
Duane Morris LLP
Rousseau Research Inc.
LandOfFree
Removing oil from surface using dry amorphous silica product... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Removing oil from surface using dry amorphous silica product..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Removing oil from surface using dry amorphous silica product... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2730373