Microfabricated filter with specially constructed channel walls,

Details Microfabricated filter with specially constructed channel walls, Microfabricated filter with specially constructed channel walls,

1996-06-14

1998-08-25

Drodge, Joseph W.

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050022, 21050026, 216 56, 424424, 6048901, B01D 6910, B01D 7102, A61K 952

Patent

active

057980420

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. The pores of the wells and capsules are large enough to let a desired biologically-active molecular product through, while blocking the passage of all larger immunological molecules. The containment wells and capsules provide enhanced biological compatibility and useful life.

REFERENCES:
patent: 2226381 (1940-12-01), Norris
patent: 2226383 (1940-12-01), Norris
patent: 2226384 (1940-12-01), Norris
patent: 2246380 (1941-06-01), Norris
patent: 3329541 (1967-07-01), Mears
patent: 3502455 (1970-03-01), Gardner
patent: 3556945 (1971-01-01), Messing
patent: 3600147 (1971-08-01), McKinnis et al.
patent: 3791987 (1974-02-01), Fanger
patent: 3841971 (1974-10-01), Messing
patent: 3845770 (1974-11-01), Theeuwes et al.
patent: 3936329 (1976-02-01), Kendall et al.
patent: 3962052 (1976-06-01), Abbas et al.
patent: 4063271 (1977-12-01), Bean et al.
patent: 4077885 (1978-03-01), Van Heuven et al.
patent: 4078971 (1978-03-01), Arkles et al.
patent: 4177228 (1979-12-01), Prolss
patent: 4217898 (1980-08-01), Theeuwes
patent: 4307507 (1981-12-01), Gray et al.
patent: 4369565 (1983-01-01), Muramatsu
patent: 4409331 (1983-10-01), Lim
patent: 4455143 (1984-06-01), Theeuwes et al.
patent: 4473476 (1984-09-01), McMillan et al.
patent: 4673566 (1987-06-01), Goosen et al.
patent: 4689150 (1987-08-01), Abe et al.
patent: 4698900 (1987-10-01), Esquivel
patent: 4743545 (1988-05-01), Torobin
patent: 4793825 (1988-12-01), Benjamin et al.
patent: 4797175 (1989-01-01), Elion et al.
patent: 4797211 (1989-01-01), Ehrfeld et al.
patent: 4814083 (1989-03-01), Ford et al.
patent: 4841228 (1989-06-01), Zentner et al.
patent: 4851228 (1989-07-01), Zentner et al.
patent: 4853001 (1989-08-01), Hammel
patent: 4874484 (1989-10-01), Foell et al.
patent: 4937209 (1990-06-01), Jones et al.
patent: 4981590 (1991-01-01), Van 'T Veen et al.
patent: 5126810 (1992-06-01), Gotou
patent: 5131978 (1992-07-01), O'Neill
patent: 5156623 (1992-10-01), Hakamatsuka et al.
patent: 5160617 (1992-11-01), Huis Int'l Veld et al.
patent: 5183607 (1993-02-01), Beall et al.
patent: 5200334 (1993-04-01), Dunn et al.
patent: 5225123 (1993-07-01), Torobin
patent: 5230693 (1993-07-01), Williams et al.
patent: 5234594 (1993-08-01), Tonucci et al.
patent: 5238613 (1993-08-01), Anderson
patent: 5262021 (1993-11-01), Lehman et al.
patent: 5271801 (1993-12-01), Valette
patent: 5275766 (1994-01-01), Gadkaree et al.
patent: 5304487 (1994-04-01), Wilding et al.
patent: 5314471 (1994-05-01), Brauker et al.
patent: 5376347 (1994-12-01), Ipponmatsu et al.
patent: 5431921 (1995-07-01), Thombre
patent: 5453278 (1995-09-01), Chan et al.
patent: 5543046 (1996-08-01), Van Rijn
patent: 5585011 (1996-12-01), Saaski et al.
patent: 5603953 (1997-02-01), Herbig et al.
patent: 5629008 (1997-05-01), Lee
patent: 5651900 (1997-07-01), Keller et al.
patent: 5660680 (1997-08-01), Keller
patent: 5660728 (1997-08-01), Saaski et al.
G. Kittilsland et al., "A Sub-Micron Particle Filter in Silicon," Sensors and Actuators, A21-A23, (1990), pp. 904-907.
W. Lang et al., "Application of Porous Silicon as a Sacrificial Layer, " 7th International Conference on Solid-State Sensors and Actuators Digest of Technical Papers, Jun. 7-10, 1993, pp. 202-205.
Websters Third New International Dictionary, Copyright 1986 by Merriam-Webster, Inc. p. 811.
J. P. Brody et al., "A Planar Microfabricated Fluid Filter," 8th International Conference on Solid-State Sensors and Actuators, Jun. 25-29, 1995, pp. 779-782.
D. H. Pearson et al., "Nanochannel Glass replica Membranes," Science, vol. 270, Oct. 6, 1995, pp. 68-69.

Affiliated with

Also associated with

Rating

Microfabricated filter with specially constructed channel walls, does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microfabricated filter with specially constructed channel walls,, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microfabricated filter with specially constructed channel walls, will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-34171