Transparent astatic resinous articles and method for their production
US3959561A · kind A · utility
11Cited by
11References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 28, 1971 |
| Grant date | May 25, 1976 |
| Priority date | — |
| Expiry date | Jun 28, 1991 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31507
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for the rapid rendering of transparent polymer articles astatic by treating the articles with dilute gaseous sulfur trioxide followed by treatment with base such as ammonia and water or dilute aqueous ammonia. The articles are rendered permanently astatic without affecting their transparency by this process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.