E-cigarette personal vaporizer
US11083228B2 · kind B2 · utility
2Cited by
19References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2020 |
| Grant date | Aug 10, 2021 |
| Priority date | — |
| Expiry date | Mar 20, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/0063
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An e-cigarette PV that includes an air pressure valve or device so that excess air can escape from an e-liquid reservoir in the PV when that reservoir is being filled under pressure with e-liquid from a parent reservoir. The valve or device is a barrier made of an air-porous material, such as a sintered polymer or metal, coated with or otherwise including a barrier or layer of an air-porous substance that is not porous to e-liquid, such as an oleophobic material or a hydrophobic or super-hydrophobic material. The oleophobic material is one of: sintered phosphor bronze, sintered stainless steel and sintered PU plastic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.