Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2003-10-31
2010-06-15
Pezzuto, Helen L. (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S271000, C526S277000, C526S287000, C526S288000, C526S303100, C526S307000, C526S307600, C526S307700, C526S310000, C526S318400, C526S328500, C526S329200, C526S329300, C526S342000, C526S343000, C526S344000, C526S347000, C526S347100, C526S348000
Reexamination Certificate
active
07737237
ABSTRACT:
The present invention concerns a controlled structure copolymer comprising at least two different parts, a first part A, amphoteric or zwitterionic, including anionic or potentially anionic units, and cationic or potentially cationic units, or zwitterionic units, and another part B, non amphoteric or zwitterionic. Said copolymer further exhibits a high potential for adaptation, through variation in its composition, in order to improve or modify the properties of compositions in which it is introduced.
REFERENCES:
patent: 4395444 (1983-07-01), Das et al.
patent: 6174963 (2001-01-01), Tamazawa et al.
patent: 7071156 (2006-07-01), Aubay et al.
patent: 7141519 (2006-11-01), Bunyard et al.
patent: 09-279084 (1997-10-01), None
patent: WO02/28929 (2002-04-01), None
Hunton & Williams LLP
Pezzuto Helen L.
Phodia Chimie
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