Electric cable
US4238638A · kind A · utility
9Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1978 |
| Grant date | Dec 9, 1980 |
| Priority date | — |
| Expiry date | Dec 8, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A30/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric cable having a core made of insulated conductors disposed within a polymeric sheath. Voids within the core, between the conductors, are at least partially filled in the unused cable with a mixture comprising untreated calcium carbonate and a water-attracting polymer able to form a gel on contact with water without swelling. The cables are made waterproof by the presence of the mixture, which is cheaper than prior mixtures but as effective.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.