Production of pearls based on expanded polymers
US8529812B2 · kind B2 · utility
0Cited by
20References
13Claims
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Key dates
| Filing date | Jun 30, 2004 |
| Grant date | Sep 10, 2013 |
| Priority date | — |
| Expiry date | Jun 30, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249987
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Pearls based on expanded polymers are produced by extruding an expandable composition containing a thermoplastic polymer and an expanding agent, and thereafter cooling and chopping the expanded material thus obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.