Patent classifications
Y
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Y10
TECHNICAL SUBJECTS COVERED BY FORMER USPC
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Y10T
TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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428/00
Stock material or miscellaneous articles
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Y10T428/249921
Web or sheet containing structurally defined element or component
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Y10T428/249953
Composite having voids in a component [e.g., porous, cellular, etc.]
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Y10T428/249978
Voids specified as micro
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Y10T428/249979
Specified thickness of void-containing component [absolute or relative] or numerical cell dimension
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