Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...
Reexamination Certificate
2011-03-01
2011-03-01
McClendon, Sanza L (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Process of treating scrap or waste product containing solid...
C521S040000, C521S048000, C522S081000, C522S082000, C522S083000, C522S104000, C522S150000, C522S153000, C522S178000, C522S165000, C522S182000
Reexamination Certificate
active
07897651
ABSTRACT:
A method for rapidly depolymerizing a polyester and an unsaturated polyester by irradiating the polyester with microwaves in the presence of an alkylene glycol in which a titanium oxide fine powder having a bulk density of not more than 0.3 g/cm3has been dispersed. Another embodiment comprises irradiating a polyester or an unsaturated polyester with microwaves in the presence of a monohydric alcohol or polyhydric alcohol containing an alkali metal and/or an alkaline earth metal. As a result, raw materials of a polyester, an unsaturated polyester or a polyurethane, such as an alkylene glycol and an unsaturated dibasic acid, can be recovered efficiently.
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McClendon Sanza L
The Webb Law Firm
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