Door latch for alarm system
US6893060B2 · kind B2 · utility
1Cited by
11References
8Claims
0Family size
Inventor
Key dates
| Filing date | Feb 12, 2003 |
| Grant date | May 17, 2005 |
| Priority date | — |
| Expiry date | Apr 5, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/11
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Door-lock hardware is constructed of corrosion-resistant material such as stainless steel. Such a material lacks magnetic properties to permit use in association with magnetic switches coupled to signal alarm and security systems. However, according to the preferred embodiment of the invention, a door latch of stainless steel or other non-magnetic material includes a ferrous-coated tongue portion to maintain compatibility with such monitors and alarms while providing a higher level of rust- and corrosion-resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.