Composite card
US6644552B1 · kind B1 · utility
61Cited by
6References
17Claims
0Family size
Inventor
Key dates
| Filing date | Jul 9, 2002 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Jul 9, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D2033/30
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Multi-layered cards embodying the invention include a buffer layer between a PET layer and a PVC layer. The buffer layer is selected to have temperature and stress responsive properties intermediate to those of the PET and PVC layers. The buffer layer is formed of a material which has a low degree of moisture absorbance whereby the surface of the PVC layer is protected from moisture in the atmosphere. The buffer layer is also more elastic than the PVC layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.