PEM layer-by-layer systems for coating substrates to improve bioactivity and biomolecule delivery
US11149166B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2014 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | Nov 9, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L2420/08
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to polyelectrolyte multilayer coatings and, methods for their preparation and application to substrates to enhance the bioactivity and corrosion protection of the substrates' surface. The invention is particularly suitable for coating substrates employed for medical applications, such as but not limited to medical implant devices for drug and/or biologics delivery in a patient. The substrate has a positive or negative charge. The polyelectrolyte multilayer coatings include at least a first polymer layer and a second polymer layer. The first polymer and second polymer have opposite charges. Each of the polymer layers is individually applied using a layer-by-layer such that an alternating charge multilayer coating is formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.