Hydrophilic fluid transport device
US-9383294-B2 · Jul 5, 2016 · US
Nanostructured spore carrier
US9650661B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9650661-B2 |
| Application number | US-201414891760-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 13, 2014 |
| Priority date | May 21, 2013 |
| Publication date | May 16, 2017 |
| Grant date | May 16, 2017 |
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Abstract
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Spore carriers suitable for use in biological indicators are described. The spore carriers include a substrate such as polymeric film or non-woven web with a hydrophilic nanostructured layer bonded to it. Spores are bonded to the nanostructured layer. Nanostructured layers including nanoparticles, such as acid-sintered silica nanoparticles are described. Biological indicators including such spore carriers are also described.
First claim
Opening claim text (preview).
What is claimed is: 1. A spore carrier comprising a substrate, a hydrophilic nanostructured layer bonded to a surface of the substrate; and spores bonded to the nanostructured layer; wherein the nanostructured layer comprises silica nanoparticles. 2. The spore carrier of claim 1 , wherein the nanostructured layer has a receding contact angle of no greater than 50 degrees as measured by the Contact Angle Method. 3. The spore carrier of claim 1 , wherein the nanostructured layer has a receding contact angle of no greater than 20 degrees as measured by the Contact Angle Method. 4. The spore carrier of claim 1 , wherein the silica nanoparticles are acid sintered. 5. The spore carrier of claim 1 , wherein the nanoparticles have an average diameter of no greater than 20 nm. 6. The spore carrier of claim 1 , wherein the nanostructured layer has an RMS roughness of at least 10 nm. 7. The spore carrier of claim 6 , the nanostructured layer has an RMS roughness of no greater than 500 nm. 8. The spore carrier of claim 1 , wherein the nanostructured layer further comprises microparticles. 9. The spore carrier of claim 1 , wherein the nanostructured layer further comprises a binder. 10. The spore carrier of claim 9 , wherein the binder comprises a tetraalkoxysilane. 11. The spore carrier of claim 1 , wherein the substrate is a polymeric substrate. 12. The spore carrier of claim 11 , wherein the polymeric substrate comprises polyester. 13. The spore carrier of claim 12 , wherein the polymeric substrate comprises polypropylene. 14. The spore carrier of claim 1 , wherein the substrate is a woven or non-woven web. 15. The spore carrier of claim 1 , wherein the substrate is a film. 16. The spore carrier of claim 1 , wherein the spores comprise at least one of Geobacillus stearothermophilus and Bacillus atrophaeus. 17. A biological indicator comprising a housing and the spore carrier of claim 1 . 18. The spore carrier of claim 1 , wherein the wherein the nanostructured layer comprises silica nanoparticles deposited out of an aqueous coating composition having a pH of less than 3.
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- What does patent US9650661B2 cover?
- Spore carriers suitable for use in biological indicators are described. The spore carriers include a substrate such as polymeric film or non-woven web with a hydrophilic nanostructured layer bonded to it. Spores are bonded to the nanostructured layer. Nanostructured layers including nanoparticles, such as acid-sintered silica nanoparticles are described. Biological indicators including such spo…
- Who is the assignee on this patent?
- 3M Innovative Properties Co
- What technology area does this patent fall under?
- Primary CPC classification C12Q1/22. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 16 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).