Polymer gel contact masks and methods and molds for making same
US6770721B1 · kind B1 · utility
29Cited by
54References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 2, 2000 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Nov 2, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to elastomeric contact masks, and methods of making these contact masks by complementary molding using complementary molds. The contact masks are made of polymer gels, including hydrogel materials. The complementary molds of the present invention include at least one elastomeric half mold. Also disclosed are methods of continuous complementary molding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.