RIGID STRUCTURE COMPRISED OF HOLLOW,SEALED SPHERES BONDED TOGETHER
United States Patent 3427139
US Patent References:
Structural element having sphericallike filling
- - 2985411
Sandwich structure
- - 3031046
Lightwight porous structures and methods of making same
- - 3135044
Method of producing porous hollow nickel bodies
- - 3371405
Structural element having sphericallike filling
- - 2985411
Sandwich structure
- - 3031046
Lightwight porous structures and methods of making same
- - 3135044
Method of producing porous hollow nickel bodies
- - 3371405
Inventors:
Gregory, William C.
Publication Date:
02/11/1969
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Assignee:
William, Gregory C.
Primary Class:
Other Classes:
428/656, 428/627, 428/634, 428/34.100, 428/381, 428/544, 428/570, 89/36.170, 89/36.020, 149/2, 428/406, 428/645, 428/384, 428/934, 428/567, 428/630, 52/793.100, 428/552
International Classes:
B21C37/02; B21D51/24; B22F3/11; E04B1/76; F41H5/04; B21C37/00; B21D51/16; F41H5/00; E04B1/74