Fire rated door
US11512523B2 · kind B2 · utility
4Cited by
41References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 27, 2018 |
| Grant date | Nov 29, 2022 |
| Priority date | — |
| Expiry date | Jan 10, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/588
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A closure may include a door configured to seal an opening. The door may include a section with an internal cavity. The closure may also include a core within a first portion of the internal cavity of the section. The core may be configured to expand from a relaxed state to an expanded state and provide a seal between the door and an edge of the opening when the core is in the expanded state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.