US PATENT SUBCLASS 428 / 448
.~.~ As intermediate layer

Current as of: June, 1999
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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

411.1  DF  COMPOSITE (NONSTRUCTURAL LAMINATE) {25}
446  DF  .~ Of silicon containing (not as silicon alloy) {6}
448.~.~ As intermediate layer {1}
449  DF  .~.~.~> Paper as both adjacent layers

DEFINITION

Classification: 428/448

(under subclass 446) Product in which the silicon containing layer lies in between and adjacent to two other layers.

(1) Note. In many of these patents, the intermediate layer comprises sodium silicate which acts as an adhesive.