Plastic floor tile
US5121576A · kind A · utility
2Cited by
3References
1Claims
0Family size
Inventor
Key dates
| Filing date | May 8, 1990 |
| Grant date | Jun 16, 1992 |
| Priority date | — |
| Expiry date | May 8, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04F15/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved plastic floor tile formed with an internal stress eliminating structure including grooves or recesses disposed on the lower surface of the floor tile at four corners and four sides thereof, whereby contractile internal stress caused by thermal change can be interrupted from reaching the four corners or margin portions of the floor tile by the internal stress eliminating structure so as to effectively prevent distortion of the four corners or margin portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.