Patent US3901808A successfully refreshed from Google Patents.
US3901808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood filter
Assignee: General Atomics Corp
•
Filing: 1974-02-25
•
Granted: 1975-08-26
•
Expires: 1994-02-25
Abstract
Abstract A device for treating human blood prior to its return to a living human body. The blood filter employs a bed of particles between about 50 and 1,000 microns in size, the outer surface of which particles is formed of impermeable carbon. Suitable spheres may be coated with vapor-deposited pyrolytic carbon, and the particles may be supported between upper and lower screens which are likewise coated.
Inventors
- 👤 Jack C Bokros
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:03
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/02; B01D39/06; A; A61; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/3627; B01D2239/00; B01D2239/04; B01D2239/0471; B01D2239/0485; B01D2239/12; B01D2239/1241; Y; Y10; Y10S; Y10S128/00; Y10S128/03
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
107 words
A DEVICE FOR REATING HUMAN BLOOD PRIOR TO ITS RETURN TO A LIVING HUMAN BODY, WHICH DEVICE COMPRISES A HOUSING HAVE A CHAMBER FORMED THEREIN, ENTRANCE MEANS AND EXIT MEANS COMMUNICATING WITH SAID CHAMBER, AND A BED OF PARTICLES DISPOSED IN SAID CHAMBER SO THAT A LIQUID MUST PASS THROUGH SAID BED IN ORDER TO TRAVEL FROM SAID ENTRANCE TO SAID EXIT, SAID PARTICLE BED BEING MADE UP OF INDIVIDUAL PARTICLES BETWEEN ABOUT 50 AND 1000 MICRONS IN SIZE, THE OUTER SURFACE OF SAID PARTICLES BEING SMOOTH AND FORMED OF IMPERMEABLE CARBON HAVING A DENSITY EQUAL TO AT LEAST ABOUT 70 PERCENT OF ITS THEORETICAL MAXIMUM DENSITY.
Claim 2
Independent Claim
107 words
A DEVICE FOR REATING HUMAN BLOOD PRIOR TO ITS RETURN TO A LIVING HUMAN BODY, WHICH DEVICE COMPRISES A HOUSING HAVE A CHAMBER FORMED THEREIN, ENTRANCE MEANS AND EXIT MEANS COMMUNICATING WITH SAID CHAMBER, AND A BED OF PARTICLES DISPOSED IN SAID CHAMBER SO THAT A LIQUID MUST PASS THROUGH SAID BED IN ORDER TO TRAVEL FROM SAID ENTRANCE TO SAID EXIT, SAID PARTICLE BED BEING MADE UP OF INDIVIDUAL PARTICLES BETWEEN ABOUT 50 AND 1000 MICRONS IN SIZE, THE OUTER SURFACE OF SAID PARTICLES BEING SMOOTH AND FORMED OF IMPERMEABLE CARBON HAVING A DENSITY EQUAL TO AT LEAST ABOUT 70 PERCENT OF ITS THEORETICAL MAXIMUM DENSITY.
Claim 3
Dependent Claim
21 words
A device in accordance with claim 1 wherein said particles are spheroids between about 100 and about 500 microns in size.
Claim 4
Dependent Claim
22 words
A device in accordance with claim 1 wherein said bed of particles is supported in said chamber between a pair of screens.
Claim 5
Dependent Claim
34 words
A device in accordance with claim 3 wherein said housing is formed with said entrance means and a vent in the upper portion thereof and with said exit means in the lower portion thereof.
Claim 6
Dependent Claim
23 words
A device in accordance with claim 4 wherein a bottom plenum chamber is provided between the lower supporting screen and said exit means.
Claim 7
Dependent Claim
15 words
A device in accordance with claim 3 wherein said screens are coated with vapor-deposited carbon.
Claim 8
Dependent Claim
31 words
A device in accordance with claim 3 wherein the screen which is disposed between said entrance means and said particle bed has openings not greater than about 75 microns in size.
Claim 9
Dependent Claim
14 words
A device in accordance with claim 1 wherein said particles have vapor-deposited carbon coatings.
Claim 10
Dependent Claim
14 words
A device in accordance with claim 1 wherein said particles have pyrolytic carbon coatings.
Claim 11
Dependent Claim
19 words
A device in accordance with claim 1 wherein the outer surface of said particles is made of glassy carbon.
Claim 12
Dependent Claim
22 words
A device in accordance with claim 1 wherein the surface of said housing which forms said chamber is coated with vapor-deposited carbon.
References Cited (Backward Citations)
US2448337A
Cited
US2570639A
Cited
US2682686A
Cited
US2682268A
Cited
US2922722A
Cited
US3107180A
Cited
US3471314A
Cited
US3701433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |