US2985587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for dialysis
Assignee: MEDICAL COLLEGE OF VIRGINIA FO
•
Filing: 1958-01-10
•
Granted: 1961-05-23
•
Expires: 1978-01-10
Abstract
No abstract record available.
Inventors
- 👤 Hoch Hans
- 👤 Ray C Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:29
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/24; B01D61/28; B01D61/243; B01D63/00; B01D63/16; B01D2315/00; B01D2315/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A METHOD OF DIALYZING A SOLUTION IN CONTACT WITH A FIRST SURFACE OF A MEMBRANE, WHICH METHOD COMPRISES COVERING A SECOND SURFACE OF SAID MEMBRANE, OPPOSED TO SAID FIRST SURFACE, WITH A LIQUID FLUID, AND PERIODICALLY ANGULARLY DISPLACING SAID MEMBRANE ABOUT AN AXIS SUBSTANTIALLY PERPENDICULAR TO THE BOTTOM OF SAID MEMBRANE AT A RATE WHICH PRODUCES SHEARS IN SAID SOLUTION AND SIMULTANEOUSLY STIRRING SAID LIQUID FLUID IN CONTACT WITH SAID MEMBRANE.
Claim 2
Independent Claim
71 words
A METHOD OF DIALYZING A SOLUTION IN CONTACT WITH A FIRST SURFACE OF A MEMBRANE, WHICH METHOD COMPRISES COVERING A SECOND SURFACE OF SAID MEMBRANE, OPPOSED TO SAID FIRST SURFACE, WITH A LIQUID FLUID, AND PERIODICALLY ANGULARLY DISPLACING SAID MEMBRANE ABOUT AN AXIS SUBSTANTIALLY PERPENDICULAR TO THE BOTTOM OF SAID MEMBRANE AT A RATE WHICH PRODUCES SHEARS IN SAID SOLUTION AND SIMULTANEOUSLY STIRRING SAID LIQUID FLUID IN CONTACT WITH SAID MEMBRANE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |