Plastic closure with unitarily molded, foamed sealing layer
US4744478A · kind A · utility
30Cited by
6References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 23, 1986 |
| Grant date | May 17, 1988 |
| Priority date | — |
| Expiry date | Oct 23, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D41/3447
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A molded polymeric container closure comprising at least one substantially unfoamed polymer layer and an integrally molded foamed layer of the same polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.