Filtering material and method of producing the same
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United States of America Patent
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Jan 28, 1997
Issued Date -
N/A
app pub date -
Apr 10, 1995
filing date -
Mar 16, 1992
priority date (Note) -
Expired
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Abstract
A filtering material employable as a basic material for a sanitary mask, a deodorizing filter or the like includes as essential components calcium phosphate particles, a water soluble glucan and a sheet-shaped raw material, and the calcium phosphate particles are caused to adhere to the sheet-shaped raw material with the aid of the water soluble glucan serving as a binder. A method of a filtering material is typically practiced by way of a first step of dispersing a predetermined quantity of calcium phosphate particles and a predetermined quantity of water soluble glucan in water to prepare an aqueous treatment solution, a second step of dipping a sheet-shaped raw material in the aqueous treatment solution and taking up the sheet-shaped raw material coated with the aqueous treatment solution and a third step of drying the sheet-shaped raw material coated with the aqueous treatment solution. The method of producing a filtering material may be practiced by way of a first step of dissolving a predetermined quantity of water soluble glucan in water to prepare an aqueous preliminary treatment solution, a second step of adhering the aqueous preliminary treatment solution to a sheet-shaped raw material, a third step of adhering calcium phosphate particles to the sheet-shaped raw material before the sheet-shaped raw material having the aqueous preliminary treatment solution adhering thereto is completely dried, and a fourth step of drying the sheet-shaped raw material.
First Claim
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- BESTEX KABUSHIKI-KAISHA
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Tsuru, Sumiaki | Tokyo, JP | 16 | 237 |
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Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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