Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2007-06-12
2007-06-12
Sellers, Robert (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S186000, C525S422000, C549S510000
Reexamination Certificate
active
10901631
ABSTRACT:
Compositions containing oxetane compounds having ester, amide, urea, carbamate, carbonate, or carbonyl functionality one carbon atom removed from the oxetane ring cure at high temperatures are suitable for use as underfill materials within a semiconductor package, particularly in applications using lead free solder electrical interconnections. A suitable oxetane compound has the structure:
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Gennaro Jane E.
National Starch and Chemical Investment Holding Corporation
Sellers Robert
LandOfFree
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