Polymeric tape with biocide
US4988236A · kind A · utility
15Cited by
23References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 15, 1990 |
| Grant date | Jan 29, 1991 |
| Priority date | — |
| Expiry date | May 15, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/907
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A polymeric tape intended for use underground near service lines with a biocide incorporated into the polymer. The biocide's presence in the tape after burial discourages vegetative, fungal or other biological growth near the tape. Specifically tree root growth destructive to pipes is prevented. The biocide is incorporated into the plastic tape or the plastic coating on the metallic layer of a detectable tape. The biocide is incorporated in an effective amount to have biocidal activity on the surface of the tape or in increased amounts which leach form the tape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.