Indigo dyeing process and apparatus and indigo dyed yarns and fabrics made thereby
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United States of America Patent
Stats
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Sep 12, 2023
Grant Date -
May 28, 2020
app pub date -
Jan 28, 2020
filing date -
Sep 12, 2016
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Processes and apparatus are disclosed which substantially eliminate the formation of oxidized indigo dye before and during dye application onto a natural fiber yarn or fabric while allowing the leuco-indigo dye molecule to diffuse fully into the natural fibers of the yarn where it can fix to the fibers prior to oxidation (i.e., exposure of the leuco-dyed yarns to oxygen). Indigo dyed textile products (e.g., dyed cotton yarns that may be twill woven to form a denim fabric) exhibit exceptionally high colorfastness as determined by the AATCC Crock Test.
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International Classification(s)
- 2020 Application Filing Year
- D06B Class
- 65 Applications Filed
- 40 Patents Issued To-Date
- 61.54 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- D06B Class
- 0 % this patent is cited more than
- 2 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Mar 12, 2027 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Mar 12, 2031 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 12, 2035 |
