Deep water flotation devices

Stock material or miscellaneous articles – Hollow or container type article – Cellular material derived from plant or animal source

Patent

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Details

4283044, 4283135, 4283166, 428327, 428402, B32B 326, B32B 516

Patent

active

044825900

ABSTRACT:
Novel macrospheres having improved resistance to implosion under hydrostatic pressure. The macrospheres are useful in buoyancy materials and devices.

REFERENCES:
patent: 3622437 (1971-11-01), Hobaica et al.

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