Patents by Inventor Jae C. Hyun

Jae C. Hyun has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for producing self-crimping polyamide yarns
    Patent number: 4238439
    Abstract: A melt spinning process for producing nominal 20 denier per filament polyamide yarn having a latent bulk of at least 18% is provided. The process employs polyhexamethylene adipamide modified to contain from 1 to 10 mole % of recurring units of the formula ##STR1## whereby wind-up speeds ranging from 1830 to 4570 meters per minute and higher are attainable. The resulting yarn has a usable bulk, when developed, for carpet yarn applications without further texturing of the yarn.
    Type: Grant
    Filed: October 6, 1977
    Date of Patent: December 9, 1980
    Assignee: Monsanto Company
    Inventor: Jae C. Hyun