Granted Patent
Utility
US 6,835,339 · App. 10/178,753
Process for preparing poly(trimethylene terephthalate) tetrachannel cross-section staple fiber
Inventors:
Ismael A. Hernandez, Geoffrey Hietpas, James M. Howell, Claudia Schultze
Patented Case
View Patent ↗
Granted: Dec 28, 2004
Filed: Jun 24, 2002
Inventors
Ismael A. Hernandez
Geoffrey Hietpas
James M. Howell
Claudia Schultze
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.