Biologically degradable leather

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6254644
SERIAL NO

09367992

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The present invention relates to a process for preparing leather by (I) tanning a pelt with (a) an aldehyde, or (b) a bisulphite-blocked polyisocyanate; (II) optionally, retanning the pelt with (a) a polyaspartic acid, a salt of a polyaspartic acid, a polyaspartic acid anhydride, or a mixture thereof, and/or (b) a polyaspartamide; (III) dressing the resultant product by (a) bottoming the product with a polyurethane and one or more natural bottoming assistants, and (b) applying a polyurethane and/or polyesteramide finish; and (IV) optionally, aftertreating the resultant dressed leather with a leather preservative.

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Patent Owner(s)

Patent OwnerAddress
BAYER AKTIENGESELLSCHAFTLEVERKUSEN

International Classification(s)

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  • 1999 Application Filing Year
  • C14C Class
  • 15 Applications Filed
  • 6 Patents Issued To-Date
  • 40 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances19992000200120020255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Koch, Rainhard Koln, DE 34 425
Muller, Hanns-Peter Odenthal, DE 57 480
Pisaric, Karl Pulheim, DE 2 8
Reiff, Helmut Leverkusen, DE 40 540
Reiners, Jurgen Leverkusen, DE 31 433
Renner, Gerd-Friedrich Kurten, DE 10 20
Traubel, Harro Leverkusen, DE 34 281

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Patent Citation Ranking

  • 7 Citation Count
  • C14C Class
  • 11.76 % this patent is cited more than
  • 24 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges2122101 - 1011 - 2021 - 30012345678910111213

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