Compositions – Dust suppressants for bulk materials – or processes of...
Reexamination Certificate
2008-10-01
2010-11-02
Ogden, Jr., Necholus (Department: 1796)
Compositions
Dust suppressants for bulk materials, or processes of...
C252S088200, C405S265000
Reexamination Certificate
active
07824569
ABSTRACT:
Modifications to the extracellular polymeric substance, predominantly extracellular polysaccharide, of a biopolymer produced byRhizobium tropiciATCC 49672 yield a stable dry salt transported more easily than a fluid or gel and more stable than either. The salt may be re-constituted with water on-site. Embodiments may be employed as a soil amendment for soil strengthening, reducing hydraulic conductivity, erosion control and dust control as well as a metal chelator for contaminant remediation. Based on comparison with dextran standards, an embodiment demonstrated a molecular weight over 511,000 D. Embodiments include a day salt that is precipitated from solution and in use is re-hydrated back to original form. When added to a sandy soil at 0.1% by dry weight, an embodiment decreased the hydraulic conductivity by three orders of magnitude. These properties make embodiments of the present invention an attractive, “green” alternative to petroleum-based synthetic polymers for such applications as rapid roadway construction and soil erosion prevention.
REFERENCES:
patent: 4592931 (1986-06-01), Cargle
patent: 5860770 (1999-01-01), Hunt
patent: 5934839 (1999-08-01), Mallon et al.
patent: 6689204 (2004-02-01), Stanley
patent: 6835761 (2004-12-01), Harrison
patent: 7288581 (2007-10-01), Ferrall et al.
Chouly, C. et al., NMR Studies of Succinoglycan Repeating-Unit Octasaccharides fromRhizobium melilotiandAgrobacterium radiobacter, Int. J. Biol. Macromol. 17, 357-363, 1995.
Comte et al., Biosorption Properties of Extracellular Polymeric Substances (EPS) Towards Cd, Cu and Pb for Different pH Values, Jour. of Haz, Matls. 151, 185-193, 2008.
Newman, et al., Stabilization of Silty Sand Using Polymer Emulsions, IJP 4, 1-12, 2005.
Skorupska, A. et al., Rhizobial Exopolysaccharides Genetic Control and Symbiotic Functions, Microbial Cell Factories 5, 7, 19 pp, 2006.
Xu et al., Use of Slow Release Fertilizer and Biopolymers for Stimulating Hydrocarbon Biodegradation in Oil-Contaminated Beach Sediments, Mar. Poll. Bull 51, 1101-1110, 2005.
Yu et al., Extracellular Proteins, Polysaccharides and Enzymes Impact on Sludge Aerobic Digestion after Ultrasonic Pretreatment, Water Rsch. vol. 42 (8-9), 1924-1934, 2008.
Larson Steven L.
Martin William A.
Medina Victor F.
Newman John K.
O'Connell Kevin P.
Baugher Jr. Earl H.
Ogden, Jr. Necholus
The United States of America as represented by the Secretary of
LandOfFree
Soluble salt produced from a biopolymer and a process for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Soluble salt produced from a biopolymer and a process for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Soluble salt produced from a biopolymer and a process for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4220738