US PATENT SUBCLASS 117 / 25
.~.~.~ Defines a product with a hollow structure (e.g., tube)

Current as of: June, 1999
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117 /   HD   SINGLE-CRYSTAL, ORIENTED-CRYSTAL, AND EPITAXY GROWTH PROCESSES; NON-COATING APPARATUS THEREFOR

11  DF  PROCESSES OF GROWTH FROM LIQUID OR SUPERCRITICAL STATE {7}
13  DF  .~ Having pulling during growth (e.g., Czochralski method, zone drawing) {9}
23  DF  .~.~ Shape defined by a solid member other than seed or product (e.g., edge-defined film-fed growth, Stepanov method) {3}
25.~.~.~ Defines a product with a hollow structure (e.g., tube)

DEFINITION

Classification: 117/25

Defines a product with a hollow structure (e.g., tube):

(under subclass 23) Subject matter in which the solid member controls the growth so as to define a single-crystal* product having a hollow structure.

(1) Note. Cross-referencing to art collection 920 is precluded as unnecessarily duplicative.