Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Of inorganic materials
Reexamination Certificate
2006-09-19
2006-09-19
Fortuna, Ana (Department: 1723)
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Of inorganic materials
C264S041000, C264S045100, C210S500250, C216S096000
Reexamination Certificate
active
07108813
ABSTRACT:
An improved two-step replication process for fabrication of porous metallic membranes is provided. A negative of a porous non-metallic template is made by infiltration of a liquid precursor into the template, curing the precursor to form a solid negative, and removing the template to expose the negative. Metal is deposited to surround the exposed negative. Removal of the negative provides a porous metallic membrane having pores which replicate the pores of the original template membrane. The negative is kept immersed in a liquid at all times between removing the template and depositing the metal. This immersion eliminates damage to the negative that would be incurred in drying the negative out between these processing steps. Another aspect of the invention is metallic membranes prepared according to the preceding method. For example, metallic membranes having pores smaller on one side than on the other side of the membrane are provided.
REFERENCES:
patent: 3505180 (1970-04-01), Brogden
patent: 4857080 (1989-08-01), Baker et al.
patent: 5114803 (1992-05-01), Ishihara et al.
patent: 5262021 (1993-11-01), Lehmann et al.
patent: 5308712 (1994-05-01), Seike et al.
patent: 5498278 (1996-03-01), Edlund
patent: 5620807 (1997-04-01), Mussell et al.
patent: 5645626 (1997-07-01), Edlund et al.
patent: 5734092 (1998-03-01), Wang et al.
patent: 5998058 (1999-12-01), Fredley
patent: 6027796 (2000-02-01), Kondoh et al.
patent: 6335082 (2002-01-01), Martino
patent: 6368751 (2002-04-01), Yao et al.
patent: 6498278 (2002-12-01), Clements et al.
patent: 6518194 (2003-02-01), Winningham et al.
patent: 6562446 (2003-05-01), Totsuka
patent: 6649559 (2003-11-01), Drost et al.
patent: 6673127 (2004-01-01), Allen et al.
patent: 6680013 (2004-01-01), Stein et al.
patent: 6720105 (2004-04-01), Ohlsen et al.
patent: 6743543 (2004-06-01), Muthuswamy et al.
patent: 6797422 (2004-09-01), Fan et al.
patent: 6913985 (2005-07-01), Ogihara et al.
patent: 6929764 (2005-08-01), Jiang et al.
patent: 2002/0028345 (2002-03-01), Kempf et al.
patent: 2004/0013924 (2004-01-01), Park et al.
Kuiyang Jiang et al., “Ordered porous films of organically-modified silica prepared by a two-step replicating process,” Colloids and Surfaces A: Physicochem. Eng. Aspects 179 (2001) 237-241, Elsivier Science B. V.
Kuiyang Jiang et al., “Electrodeposited Metal Sulfide Semiconductor Films with Ordered Nanohole Array Structures,” Langmuir, vol. 17. No. 12, 2001, pp. 3635-3638.
Hideki Masuda et al., “Preparation of Porous Matrial by Replacing Microstructure of Anodic Alumina Film with Metal,” Chemistry Letters, pp. 621-622, 1990, The Chemical Society of Japan.
Hideki Masuda et al., “Fabrication of Porous TiO2 Films Using Two-Step Replication of Microstructure of Anodic Alumina,” Japan Journal of Applied Physics 31 (1992) pt. 2, No. 12B.
Hideki Masuda et al., “Fabrication of Pt microporous electrodes from anodic porous alumina and immobilization of GOD into their micropores,” Journal of Electroanalytical Chemistry, 268 (1994) 333-336.
Hideki Masuda et al., “Ordered Metal Nanohole Arrays Made by a Two-Step Replication of Honeycomb Structures of Anodic Alumina,” Science, vol. 268, Jun. 9, 1995, pp. 1466-1467.
James B. Gaherty et al., “Lehmann Discontinuity as the Base of an Anisotropic Layer Beneath Continents,” Science, vol. 268, Jun. 9, 1995, pp. 1468
Y. Lei, “Preparation of highly ordered nanoporous Co membranes assembled by small quantum-sized Co particles,” J. Vac. Sci. Technol. B 19(4), Jul./Aug. 2001, pp. 1109-1114.
Cha Suk-Won
Farvid Ali
Kang Sang-kyun
Park Yong-Il
Prinz Friedrich B.
Fortuna Ana
Honda Giken Kogyo Kabushiki Kaisha
Lumen Intellectual Property Services Inc.
The Board of Trustees of the Leland Stanford Junior University
LandOfFree
Gas/ion species selective membrane supported by multi-stage... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gas/ion species selective membrane supported by multi-stage..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gas/ion species selective membrane supported by multi-stage... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3580552