Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2007-10-09
2007-10-09
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...
C526S318000, C526S227000, C526S223000, C525S330200, C525S330300, C521S029000, C521S038000
Reexamination Certificate
active
11147632
ABSTRACT:
Polymeric micro- and nano-capsules formed of a spherical single hydrophobic polymer, chemically functionalised at their surface so as to comprise hydrophilic moieties thereon are disclosed. The capsules are susceptible of absorbing a perfume and of being optionally coated with an amphiphilic copolymer. They allow the preparation of perfume delivery systems, which provide a slow release of perfuming materials while improving the substantivity of the perfume on a substrate.
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Katharina Landfester, et al, “Miniemulsion Polymerization with Cationic and Nonionic Surfactants: A Very Efficient Use of Surfactants for Heterophase Polymerization”, Macromolecules, vol. 32, No. 8, pp. 2679-2683 (1999).
XP-002246506—Abstract of Japanese Patent Application 200-407080.
Latreche Djamila
Ouali Lahoussine
Choi Ling-Sui
Firmenich SA
Winston & Strawn LLP
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