US PATENT SUBCLASS 976 / DIG 77
.~.~.~.~.~.~ The cells being provided with fuel element supporting members [G21C-3/34D2A]


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976 /   HD   NUCLEAR TECHNOLOGY

DIG 37  DD  REACTOR FUEL ELEMENTS AND THEIR ASSEMBLIES; SELECTION OF SUBSTANCES FOR USE AS REACTOR FUEL ELEMENTS [G21C-3/00] {5}
DIG 58  DD  .~ Assemblies of number of fuel elements in the form of a rigid unit [G21C-3/30] {2}
DIG 59  DD  .~.~ Bundles of parallel pin-, rod-, or tube-shaped fuel elements [G21C-3/32] {9}
DIG 71  DD  .~.~.~ Spacer grids; other spacer devices [G21C-3/34] {6}
DIG 75  DD  .~.~.~.~ Spacer grids wherein each cell has a polygonal (e.g., square cross section) ; cells formed of assembled metallic nonintersecting strips [G21C-3/34D] {1}
DIG 76  DD  .~.~.~.~.~ Polygonal cells formed of intersecting strips [G21C-3/34D2] {1}
DIG 77.~.~.~.~.~.~ The cells being provided with fuel element supporting members [G21C-3/34D2A] {2}
DIG 78  DD  .~.~.~.~.~.~.~> Supporting members formed only by deformations in the intersecting strips [G21C-3/34D2A2]
DIG 79  DD  .~.~.~.~.~.~.~> Supporting members formed only of elements fixed on the strips (e.g., by welding) [G21C-3/34D2A4]