Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2006-12-26
2006-12-26
Zucker, Paul A. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
Reexamination Certificate
active
07154000
ABSTRACT:
The preferred embodiments provide for a family of novel compositions to serve as substrates that release hydroxy acid slowly over time. Preferably the hydroxy acid is an α-hydroxy acid, more preferably it is lactic acid. The compositions are preferably made by reaction of poly(lactic acid) with multifunctional alcohols. Also disclosed are formulations based on the compounds and methods of use for both the compositions and the formulations. The preferred use of the compositions and formulations is for bioremediation purposes wherein they provide a time-release source of lactic acid to support the growth and reductive activity of microbes present in a system or medium, such as an aquifer, bioreactor, soil, industrial process, wastestream, body of water, river or well. The microbes destroy or inactivate compounds which are capable of being reduced, such as nitrogen-containing organic compounds, oxygen-containing organic compounds, polyaromatic hydrocarbons, and halogen-containing organic compounds.
REFERENCES:
patent: 4585462 (1986-04-01), Tice et al.
patent: 5071754 (1991-12-01), Walkup et al.
patent: 5264018 (1993-11-01), Koenigsberg et al.
patent: 5277815 (1994-01-01), Beeman
patent: 5434241 (1995-07-01), Kim et al.
patent: 5560904 (1996-10-01), Laugier et al.
patent: 5602296 (1997-02-01), Hughes et al.
Carney, Anna P., Abstract-Ethylene as Inhibitor of Methanogenesis/Thesis, 1995, No. C289, Cornell University.
Freedman, et al., Biological Reductive Dechlorination of Tetrachloroethylene and Trichloroethylene to Ethylene under Methanogenic Conditions, Sep. 1989. Applied and Environemental Microbiology, vol. 55, No. 9, pp. 2144-2151.
Fathepure, et al., Complete Degradation of Polychlorinated Hydrocarbons by a Two-Stage Biofilm Reactor, Dec. 1991, Applied and Environmental Microbiology. vol. 57, No. 12, pp. 3418-3422.
Fathepure, et al., Anaerobic Bacteria that Dechlorinate Perchloroethene, Nov. 1987, Applied and Environmental Microbiology, vol. 53, No. 11, pp. 2671-2674.
Ballapragada, et al., Effect of Hydrogen on Reductive Dechlorination of Chlorinated Ethenes, 1997, Environmental Science & Technology, vol. 31, No. 6, pp. 1728-1734.
Carr, et al., Enrichment of High-Rate PCE Dechlorination and Comparative Study of Lactate, Methanol, and Hydrogen as Electron Donors to Sustain Activity, 1998, Environmental Science & Technology, vol. 32, No. 12, pp. 1817-1824.
Yang, et al., Competition for Hydrogen within a Chlorinated Solvent Dehalogenating Anaerobic Mixed Culture, 1998, Environmental Science & Technology, vol. 32, No. 22, pp. 3591-3597.
S. Karjomaa, et al., Polym. Degrad Stab (1998) 59 (1-3) 333-336.
DiStefano, et al., Hydrogen as an Electron Donor for Dechlorination of Tetrachloroethene by an Anaerobic Mixed Culture, Nov. 1992, Applied and Environmental Microbiology. Vol. 58, No. 11, pp. 3622-3629.
Rafter, et al., Novel Biodegradable Polyesters, Abstract, American Chemical Society (1992).
Fennell, et al., Comparative Studies of Hydrogen Donors for Stimulation of Tetrachloroethene Dechlorination, 1997, International In Situ and On-Site Bioremediation Symposium-New Orleans, LA, p. 11.
Becvar, et al., In Situ Dechlorination of Solvents in Saturated Soils, 1997, International In Situ and On-Site Bioremediation Symposium-New Orleans, LA, pp. 39-44.
Brennan, et al. Anaerobic Microbial Transformation of Trichloroethylene and Methylene Chloride in Pinellas Soil and Groundwater, 1997, International In Situ and On-Site Bioremediation Symposium-New Orleans, LA, p. 45.
Dybas, et al., Slow-Release Substrates for Transformation of Carbon Tetrachloride by Pseudomonas Strain KC, 1997, International In Situ and On-Site Bioremediation Symposium-New Orleans, LA, p. 59.
Acree, et al. Site Characterization Methods for the Design of In-Situ Electron Donor Delivery System, 1997, International In Situ and On-Site Bioremediation Symposium-New Orleans, LA, pp. 261-266.
Gibson, et al., Stimulation of Reductive Dechlorination of Tetrachloroethene in Anerobic Aquifer Microcosms by Addition of Short-Chain Organic Acids or Alcohols, Apr. 1992. Applied and Environmental Microbiology, vol. 58, No. 4, pp. 1392 and 1393.
Smatlak, et al., Comparative Kinetics of Hydrogen Utilization for Reductive Dechlorination of Tetrachloroethene and Methanogenesis in an Anaerobic Enrichment Culture. 1996, Environemental Science§ Technology, 30, pp. 2850-2858.
Fennell, et al., Comparison of Butyric Acid, Ethanol, Lactic Acid, and Propionic Acid as Hydrogen Donors for the Reductive Dechlorination of Tetrachloroethene, 1997. Environmental Science§ Technology, 31, pp. 918-926.
DiStefano, et al., Reductive Dechlorination of High Concentrations of Tetrachloroethene to Ethene by an Anaerobic Enrichment Culture in the Absence of Methanogenesis, Aug. 1991, Applied and Environmental Microbiology. vol. 57, No. 8. pp. 2287-2292.
Biodegradable Poly (Lactic Acid) Compositions with Improved Physical Properties, May 7, 1995, Chemical Abstracts, vol. 126, No. 11, p. 637, No. 144978t.
Shin, et al., Biodegradability of Degradable Plastics Exposed to Anaerobic Digested Sludge and Simulated Landfill Conditions, 1997, Chemical Abstracts, vol. 126, No. 22, p. 1009, No. 297116k.
Kakizawa, Yasutoshi, Process for the Preparation of Lactic Acid-Based Polyester Compositions, Apr. 2, 1997, Chemical Abstracts, vol. 126, No. 23, p. 563, No. 306163c.
Morse, et al., A Treatability Test for Evaluating the Potential Applicability of the Reductive Anaerobic Biological In Situ Treatment Technology (RABITT) to Remediate Chloroethenes, Aug. 25, 1997, Department of Defense-Technical Protocal (Draft).
Slover, Michael Augustine, Abstract/Thesis. 1993, No. S8892, Cornell University.
Smatlak, Concordia Ruth, Abstract/Thesis, 1995, No. S6362, Cornell University.
Farone William A.
Koenigsberg Stephen S.
Palmer Tracy
Knobbe Martens Olson & Bear LLP
Regenesis Bioremediation Products
Zucker Paul A.
LandOfFree
Methods of using polylactate release compounds does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods of using polylactate release compounds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods of using polylactate release compounds will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3659925