Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2007-07-03
2007-07-03
Choi, Ling-Sui (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S329700, C424S078350, C424S078310, C424S422000, C424S423000, C424S487000
Reexamination Certificate
active
10937472
ABSTRACT:
Multifunctional biocompatible hydrophilic gel contains, in % (w/w), acrylamide—1.95-8.0, methacrylamide—0.54-3.0, 2-hydroxyethyl methacrylate—0.003-0.4, N,N′-methylene-bis-acrylamide—0.006-0.6 and water—q.s. to 100. The hydrophilic gel is produced by co-polymerization of the above mentioned monomers in water medium in the presence of a peroxide initiator of polymerization in three stages which include (1) incubation of the reaction mixture at 20-30° C. for 12-24 hours, (2) exposure to γ-radiation at a dose of 0.4-1.0×106rads, and (3) incubation at a temperature of 100-130° C. and pressure of 0-1.2 atm. for 20-40 minutes.
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Choi Ling-Sui
Ladas and Parry LLP
Obschestvos Organichennoy Otvetstvennostyu “Vitagelȁ
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