Appeal No. 2001-0647
Application 08/150,703
Quisumbing teaches controlled release of insect pheromones from polymeric
material with the active ingredient (pheromone) implanted in a layer (page 214,
seventh full paragraph). This reference also teaches that the inner layer serves as a
reservoir for the active ingredient (pheromone) and that additional active ingredients
(such as insecticides) may also be included in the this layer. Quisumbing then
discusses the nature of the reservoir (inner layer) and the controlled release of
pheromones:
Essentially the laminated active agent in the dispenser migrates
continually, due to an imbalance of chemical potential, from the
reservoir layer through one or more outer layers to the exposed
surface and it thereby becomes available for biological action. (page
217, third full paragraph)…In previous studies with an antibacterial
agent, an insecticide, and a fungicide, transport or release was
fastest through the flexible PVC barrier film, followed by rigid PVC,
acrylic, polypropylene, nylon and polyester. Polymer backbone
stiffness is an important consideration when controlling the release
rate of certain pheromone components, e.g. aldehydes, which are
normally volatile and unstable. (page 219, paragraph c)
We note significant overlap between the polymer backbone materials taught by
Quisumbing and the binders taught by Stendel, corroborating our position that
the binders taught by Stendel provide the dual function of binders and controlled-
release polymers.
The question now becomes whether there is a reason, suggestion or
motivation to include a pheromone in the coatings taught by Stendel. We find said
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