Methods, compositions, and delivery systems for therapeutic skin treatments
US-2024390236-A1 · Nov 28, 2024 · US
Porous cellulose particles and cosmetic preparation
US2025170030A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2025170030-A1 |
| Application number | US-202418808890-A |
| Country | US |
| Kind code | A1 |
| Filing date | Aug 19, 2024 |
| Priority date | Nov 28, 2023 |
| Publication date | May 29, 2025 |
| Grant date | — |
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- Title
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Abstract
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Porous cellulose particles contain a cellulose, a cellulose derivative, or a mixture thereof as a main component, in which the porous cellulose particles have open cells extending from a particle surface to a particle interior, and have a BET specific surface area of 1.7 m 2 /g or more and 24.0 m 2 /g or less.
First claim
Opening claim text (preview).
What is claimed is: 1 . Porous cellulose particles comprising: a cellulose, a cellulose derivative, or a mixture thereof as a main component, wherein the porous cellulose particles have open cells extending from a particle surface to a particle interior, and have a BET specific surface area of 1.7 m 2 /g or more and 24.0 m 2 /g or less. 2 . The porous cellulose particles according to claim 1 , wherein the BET specific surface area is 8.0 m 2 /g or more and 20.0 m 2 /g or less. 3 . The porous cellulose particles according to claim 1 , wherein, when cross sections of the porous cellulose particles are observed, an area ratio of the open cells is 15% or more and 90% or less. 4 . The porous cellulose particles according to claim 3 , wherein, when cross sections of the porous cellulose particles are observed, the area ratio of the open cells is 25% or more and 85% or less. 5 . The porous cellulose particles according to claim 1 , wherein the cellulose derivative is cellulose acylate having a degree of substitution of 0.6 or less. 6 . The porous cellulose particles according to claim 5 , wherein the cellulose derivative is cellulose acylate having a degree of substitution of 0.2 or less. 7 . The porous cellulose particles according to claim 1 , wherein the porous cellulose particles have a volume-average particle size of 3 μm or more and 45 μm or less. 8 . A cosmetic preparation comprising the porous cellulose particles according to claim 1 . 9 . A cosmetic preparation comprising the porous cellulose particles according to claim 2 . 10 . A cosmetic preparation comprising the porous cellulose particles according to claim 3 . 11 . A cosmetic preparation comprising the porous cellulose particles according to claim 4 . 12 . A cosmetic preparation comprising the porous cellulose particles according to claim 5 . 13 . A cosmetic preparation comprising the porous cellulose particles according to claim 6 . 14 . A cosmetic preparation comprising the porous cellulose particles according to claim 7 .
Assignees
Inventors
Classifications
General cosmetic use · CPC title
Preparations for care of the skin · CPC title
Granulated powders · CPC title
- A61K8/731Primary
Cellulose; Quaternized cellulose derivatives · CPC title
Preparations containing skin colorants, e.g. pigments (preparations in powder form A61Q1/12) · CPC title
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- What does patent US2025170030A1 cover?
- Porous cellulose particles contain a cellulose, a cellulose derivative, or a mixture thereof as a main component, in which the porous cellulose particles have open cells extending from a particle surface to a particle interior, and have a BET specific surface area of 1.7 m 2 /g or more and 24.0 m 2 /g or less.
- Who is the assignee on this patent?
- Fujifilm Business Innovation Corp
- What technology area does this patent fall under?
- Primary CPC classification A61K8/731. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Thu May 29 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).