Unitary porous themoplastic writing nib
US3942903A · kind A · utility
18Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1974 |
| Grant date | Mar 9, 1976 |
| Priority date | — |
| Expiry date | Apr 23, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3154
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process is provided to form spherical thermoplastic particles that involves dispersing a thermoplastic powder in a liquid that is a partial solvent for the thermoplastic, breaking the dispersion into droplets, forming thermoplastic spheres by heating the droplets to a temperature sufficient to at least partially solubilize the thermoplastic and to evaporate the solvent. Unique products, including porous structures, may be produced from material formed by this process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.