Synthetic-resin road marker and method of molding same
US4249357A · kind A · utility
17Cited by
7References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1978 |
| Grant date | Feb 10, 1981 |
| Priority date | — |
| Expiry date | Sep 28, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24612
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A tubular synthetic-resin body usable as a roadway marker comprises spaced upper and lower tubular parts interconnected by thin webs formed integrally with the upper and lower parts. A middle part of contrasting color lies between these upper and lower parts and has grooves receiving the connecting webs. Such a roadway marker is made by fitting the middle part over a core of a mold, and then injecting synthetic-resin material into the mold around this sleeve so as to form the upper and lower parts and the web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.