US PATENT SUBCLASS 117 / 210
.~.~.~.~ Means for forming a hollow structure (e.g., tube, polygon)

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

200  DF  APPARATUS {4}
206  DF  .~ For crystallization from liquid or supercritical state {5}
208  DF  .~.~ Seed pulling {7}
209  DF  .~.~.~ Including solid member shaping means other than seed or product (e.g., EDFG die) {2}
210.~.~.~.~ Means for forming a hollow structure (e.g., tube, polygon)

DEFINITION

Classification: 117/210

Means for forming a hollow structure (e.g., tube, polygon):

(under subclass 209) Subject matter which forms a crystal having a hollow structure.

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