Method for making biodegradable superabsorbent particles

Paper making and fiber liberation – Processes and products – Synthetic fiber

Reexamination Certificate

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C264S140000, C264S141000, C264S180000, C264S183000, C264S186000, C264S187000, C264S211110, C264S211160, C264S211190, C428S359000, C428S402000, C604S374000, C604S375000, C604S376000, C604S910000

Reexamination Certificate

active

07959762

ABSTRACT:
A method for making mixed polymer composite fibers in which a carboxyalkyl cellulose and a starch are blended in water to provide an aqueous gel; the aqueous gel treated with a first crosslinking agent to provide a crosslinked gel; the crosslinked gel mixed with a water-miscible solvent to provide fibers; and the fibers treated with a second crosslinking agent to provide crosslinked mixed polymer composite fibers.

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Final Office Action, Notification Date Apr. 5, 2011, U.S. Appl. No. 12/165,075, filed Jun. 30, 2008, First Named Inventor: S. Ananda Weerawarna.

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