Medical delivery device with laminated stopper
US12090305B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 2022 |
| Grant date | Sep 17, 2024 |
| Priority date | — |
| Expiry date | Mar 1, 2043 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/0238
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present disclosure relates to a medical delivery device that includes a barrel having an inner surface, a plunger rod having a distal end inserted within the barrel, and a stopper attached to the distal end of the plunger rod and contacting at least a portion of the inner surface of the barrel. In at least one embodiment, the inner surface is hydrophilic. The stopper may include an elastomeric body, one or more fluoropolymer layers, and two or more ribs laminated with the one or more fluoropolymer layers. In some embodiments, the contact width between at least one rib having a sealing surface and the portion of the inner surface of the barrel measured at a compressibility of greater than about 7.9% of the stopper is less than about 1.0 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.