Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Reexamination Certificate
2007-01-02
2007-01-02
Kumar, Shailendra (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
C564S204000, C564S205000, C426S422000, C426S423000, C526S304000
Reexamination Certificate
active
10333085
ABSTRACT:
The method of separating reversibly thermally precipitable oligomeric N-substituted (meth)acrylamides and conjugates thereof from aqueous solution includes thermally precipitating the oligomeric N-substituted (meth)acrylamides and the conjugates thereof from an aqueous solution in the presence of at least one salt and then filtering in the presence of at least one filter aid. The filter aid has a wet density of 0.2–0.3 g/cc and comprises≧99% cellulose with fiber lengths<75 μm (99%) and=μm (65%). The salt can be a potassium, sodium, ammonium, calcium and/or magnesium chloride, acetate and/or sulfate salt and can be present in the aqueous solution in a concentration between 0.01 M and 3 M.
REFERENCES:
patent: 3666809 (1972-05-01), Okuno et al.
patent: 3945970 (1976-03-01), Spoerke
patent: 4395524 (1983-07-01), Emmons et al.
patent: 4780409 (1988-10-01), Monji et al.
patent: 4841011 (1989-06-01), Towle
patent: 5973203 (1999-10-01), Egraz et al.
patent: 6464850 (2002-10-01), Zhang et al.
patent: 6986911 (2006-01-01), Brocheton et al.
Yoshiyuki G. Takei et al: “Temperature-responsive bioconjugates . . . ”, in Bioconjugates Chem. 1993, 4, pp. 42-46.
Ding Z et al: “Synthesis and purification of thermally sensitive . . . ” Bioconjugate Chemistry, American Chemical Society, Washington, US vol. 7, 1996, pp. 121-125.
Kumar Shailendra
Polytag Technology SA
Striker Michael J.
LandOfFree
Method for the separation of oligomeric N-substituted... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for the separation of oligomeric N-substituted..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the separation of oligomeric N-substituted... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3809362