Patents by Inventor Mauro Ferrari

Mauro Ferrari 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).

  • Patent number: 5798042
    Abstract: Microfabricated filters utilizing a bulk substrate structure and a thin film structure and a method for constructing such filters. The pores of the filters are defined by spaces between the bulk substrate structure and the thin film structure and are of substantially uniform width, length and distribution. The width of the pores is defined by the thickness of a sacrificial layer and therefore may be smaller than the limit of resolution obtainable with photolithography. The filters provide enhanced mechanical strength, chemical inertness, biological compatibility, and throughput. The filters are constructed using relatively simple fabrication techniques. Also, microfabricated containment wells and capsules constructed with such filters for the immunological isolation of cell transplants and a method for constructing such containment wells and capsules.
    Type: Grant
    Filed: June 14, 1996
    Date of Patent: August 25, 1998
    Assignee: Regents of the University of California
    Inventors: Wen-Hwa Chu, Mauro Ferrari
  • Patent number: 5770076
    Abstract: Surface micromachining and bulk micromachining are employed for realizing a porous membrane with bulk support for a microparticle fiter. The filter is sufficiently sturdy to allow for easy handling. It may be used as a diffusion barrier and under high pressures. The disclosed fabrication method is simple, reliable, and integrated-circuit compatible, and thus amenable to mass production. Electronic circuitry may be integrated on the filter surface, as may be desired for several purposes, such as fluid characterization, filter self-cleaning, or charging of the filter surfaces. Methods are shown for the realization of biological containment capsules based on this microfilter.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 23, 1998
    Assignee: The Regents of the University of California
    Inventors: Wen-Hwa Chu, Mauro Ferrari
  • Patent number: 5651900
    Abstract: A thin film filter fabricated using surface micromachining. The width of the filter pores is determined by the thickness of a sacrificial thin-film layer. This dimension can be precisely controlled, and may be as small as about 50 angstroms. The pore length may also be determined by the thickness of thin film layers and can therefore be smaller than the limit of resolution obtainable with photolithography. The filters are suitable for use at high temperatures and with many harsh solvents.
    Type: Grant
    Filed: March 7, 1994
    Date of Patent: July 29, 1997
    Assignee: The Regents of the University of California
    Inventors: Christopher G. Keller, Mauro Ferrari