Superabsorbent polymer product and use in agriculture

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant which is a cellular material derived from...

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C527S312000, C047S057600

Reexamination Certificate

active

11269214

ABSTRACT:
A superabsorbent starch graft copolymer product having particle sizes useful in granule applicators for application to agricultural fields. Starch graft copolymers applied to field crops provide excellent anti-crusting properties, increased seed germination and stand, increased crop growth, increased yields, and reduced water requirements.

REFERENCES:
patent: 3935099 (1976-01-01), Weaver et al.
patent: 3981100 (1976-09-01), Weaver et al.
patent: 3985616 (1976-10-01), Weaver et al.
patent: 3997484 (1976-12-01), Weaver et al.
patent: 4076663 (1978-02-01), Masuda et al.
patent: 4134863 (1979-01-01), Fanta et al.
patent: 4155888 (1979-05-01), Mooth
patent: 4194998 (1980-03-01), Fanta et al.
patent: 4323487 (1982-04-01), Jones et al.
patent: 4483950 (1984-11-01), Fanta et al.
patent: 5350799 (1994-09-01), Woodrum et al.
patent: 5821286 (1998-10-01), Xu et al.
patent: 5965149 (1999-10-01), Silver
patent: 2003/0020043 (2003-01-01), Barresi et al.
“Absorbent Polymers from Starch and Flour Through Graft Polymerization of Acrylonitrile and Comonomer Mixtures,” by G. F. Fanta, R. C. Burr, W. M. Doane, and C. R. Russell,Northern Regional Research Laboratory, Agricultural Research Service, U. S. Department of Agriculture, Peoria, Illinois 61604; Starch/Stärke 30 (1978) Nr. 7, S. 237-242.
“Swelling and Rheology of Saponified Starch-g-Polyacrylonitrile Copolymers. Effect of Starch Granule Pretreatment and Grafted Chain Length,” by N. W. Taylor, G. F. Fanta, W. M. Doane, and C. R. Russell,Northern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, Peoria, Illinois 61604; Journal of Applied Polymer Science, vol. 22, 1343-1357 (1978).
“A Practical Process for the Preparation of Super Slurper, a Starch-Based Polymer with a Large Capacity to Absorb Water,” by M. O. Weaver, R. R. Montgomery, L. D. Miller, V. E. Sohns, G. F. Fanta, and W. M. Doane,Northern Regional Research Center, Agricultural Research Service, U. S. Department of Agriculture, Peorie, Illinois 61604 (USA); Die Stärke, Jahrg. 1977 / Nr. 12, S. 410-413.
“Graft Copolymers of Starch-Polyscrylonitrile Prepared by Ferrous Ion-Hydrogen Peroxide Initiation,” by Edward I. Stout, Donald Trimnell, William M. Doane, and Charles R. Russell,Northern Regional Research Center, Agricultural Research Service, U. S. Department of Agriculture, Peoria, Illinois 61604; Journal of Applied Polymer Science, vol. 21, 2565-2573 (1977).
“Rheology of a Cellulose Graft Copolymer. Comparison with Other Closely Packed Gel Thickeners,” by N. W. Taylor and E. B. Bagley,Northern Regional Research Laboratory, Agricultural Research Service, Peoria, Illinois 61604; Journal of Applied Polymer Science, vol. 21, 1607-1613 (1977).
“Tailoring Closely Packed Gel-Particle Systems for Use as Thickening Agents,” by N. W. Taylor and E. B. Bagley,Northern Regional Research Laboratory, Agricultural Research Service, U. S. Department of Agriculture, Peoria, Illinois 61604; Journal of Applied Polymer Science, vol. 21, 113-122 (1977).
“Rheology of Dispersions of Swollen Gel Particles,” by N. W. Taylor and E. B. Bagley,Northern Research Laboratory, Agricultural Research Service, U. S. Department of Agriculture, Peoria, Illinois 61604; Journal of Polymer Science: Polymer Physics Edition; vol. 13, 1133-1144 (1975).
“Starch-Polyacrylonitrile Copolymers. Properties of Hydrogels,” by E. B. Bagley and N. W. Taylor,Northern Regional Research Laboratory, Agricultural Research Service, U. S. Department of Agriculture, Peoria, Illinois 61604; I&EC Product Research & Development, vol. 14, p. 105, Jun. 1975.
“Super Slurper Compound with a Super Thirst,” reprinted from Agricultural Research, Jun. 1975; published by the Agricultural Research Service, U. S. Department of Agriculture.
“A Polymeric Absorbent Seeks Problems to Solve,” by George F. Fanta, M. Ollidene Weaver, and William M. Doane,Northern Regional Research Laboratory, Agricultural Research Service, U. S. Department of Agriculture, Peoria, Illinois 61604;; reprinted from Chemical Technology, vol. 4, Nov. 1974, pp. 675-676.
“Dispersions or Solutions? A Mechanism for Certain Thickening Agents”, by N. W. Taylor and E. B. Bagley,Northern Regional Research Laboratory, Agriculture Research Service, U. S. Department of Agriculture, Peoria, Illinois 61604; Journal of Applied Polymer Science, vol. 18, pp. 2747-2761 (1974).
“Gel Sheets Produced by Hydration of Films from the Potassium Salt of Hydrolyzed Starch-Polyacrylonitrile Graft Copolymer,” by M. O. Weaver, E. B. Bagley, G. F. Fanta, and W. M. Doane,Northern Regional Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Peoria, Illinois 61604; Applied Polymer Symposium No. 25, 97-102 (1974).
“Hydrolyzed Starch-Polyacrylonitrile Graft Copolymer Solutions: Effect of Shear History on Transient and Steady-State Viscoelastic Behavior,” by E. B. Bailey and N. W. Taylor;Northern Regional Research Laboratory, Agricultural Research Service, U. S. Department of Agriculture, Peoria, Illinois 61604; J. Polymer Sci.: Symposium No. 45, 185-196 (1975).
“Kinetics of Grafting Acrylonitrile onto Starch,” by L. A. Gugliemelli, C. L. Swanson, and W. M. Doane,Northern Regional Research Laboratory, Agricultural Research Service, U. S. Department of Agriculture, Peoria, Illinois 61604; Journal of Polymer Science: Polymer Chemistry Edition, vol. II, 2451-2462 (1973).
“Continuous Production of Acrylonitrile-Starch Graft Copolymers by Ceric Ion Catalysis,” by Zoila Reyes, Carroll F. Clark, Frederick Dreier, and Russell C. Phillips,Stanford Research Institute, Menlo Park, Calif. 94025; and C. R. Russell and C. E. Rist,Northern Regional Research Laboratory, Agricultural Research Service, U. S. Department of Agriculture, Peoria, Illinois 61604; reprinted from I&EC Process Design & Development, vol. 12, p. 62, Jan. 1973.
“Polyacrylonitrile Distribution in Grafted Starch Granules Determined by Scanning Electron Microscopy,” by George F. Fanta, F. L. Baker, Robert C. Burr, W. M. Doane, and C. R. Russell, Peoria, Illinois (USA); Die Stärke 25, Jahrg. 1973 / Nr. 5, S. 157-161.
“Starch-Cerium(IV) Complexes in Aqueous Media: Formation, Isolation, and Stability,” by L. A. Gugliemelli, W. M. Doane, C. R. Russell, and C. L. Swanson,Northern Regional Research Laboratory, Agricultural Research Service, U. S. Department of Agriculture, Peoria, Illinois 61604; Polymer Letters, vol. 10, pp. 415-421 (1972).
“Hydrolyzed Starch-Polyacrylonitrile Graft Copolymers: Effect of Structure on Properties,” by M. O. Weaver, L. A. Gugliemelli, W. M. Doane, and C. R. Russell,Northern Regional Research Laboratory, Northern Marketing and Nutrition Research Division, Agricultural Research Service, U. S. Department of Agriculture, Peoria, Illinois 61604; Journal of Applied Polymer Science, vol. 15, pp. 3015-3024 (1971).
“Molecular Weight Distribution of the Polyacrylonitrile Moiety of Starch-Polyacrylonitrile Graft Copolymers,” by L. A. Gugliemelli, M. O. Weaver, C. R. Russell, and C. E. Rist,Northern Regional Research Laboratory, Agricultural Research Service, U. S. Department of Agriculture, Peoria, Illinois 61604; Polymer Letters, vol. 9, pp. 151-155 (1971).
“Rheological Method of Investigating Reaction between Cerium(IV) and Starch,” by L. A. Gugliemelli, M. O. Weaver and C. R. Russell,Northern Regional Research Laboratory, Agricultural Research Services, U. S. Department of Agriculture, Peoria, Illinois 61604; Polymer Letters, vol. 9, pp. 711-716 (1971).
“Copolymers of Starch and Polyacrylonitrile. Influence of Granule Swelling on Copolymer Composition under Various Reaction Conditions,” by George F. Fanta, Robert C. Burr, C. R. Russell, and C. E. Rist,Northern Regional Research Laboratory, a laboratory of the Northern Utilization Research and Development Di

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Superabsorbent polymer product and use in agriculture does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Superabsorbent polymer product and use in agriculture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Superabsorbent polymer product and use in agriculture will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3905182

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.