US2687997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dialyzers
Assignee: Individual
•
Filing: 1949-12-10
•
Granted: 1954-08-31
•
Expires: 1969-12-10
Abstract
No abstract record available.
Inventors
- 👤 Marchand John Felix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:13
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/24; B01D61/28; B01D63/00; B01D63/06; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24744
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A DIALYZER COMPRISING IN COMBINATION PERABLE INNER TUBULAR MEANS, AND A NON-PERMEABLE OUTER MEMBER SURROUNDING SAID INNER MEANS, SAID OUTER MEMBER CONTAINING A PLURALITY OF INNER LONGITUDINALLY EXTENDING GROOVES PARALLEL WITH THE AXIS OF THE TUBULAR MEANS AND HAVING RADIALLY EXTENDING WALLS FORMING FINS FOR MAKING CONTACT WITH THE SURFACE OF SAID PERMEABLE INNER MEANS, SAID OUTER MEMBER PERMITTING THE FLOW THROUGH THE GROOVES OF A WASHING STREAM IN A MANNER COUNTER TO THE FLOW OF THE DIFFUSABLE MATERIAL IN THE INNER MEANS.
Claim 2
Dependent Claim
83 words
A DIALYZER COMPRISING IN COMBINATION PERABLE INNER TUBULAR MEANS, AND A NON-PERMEABLE OUTER MEMBER SURROUNDING SAID INNER MEANS, SAID OUTER MEMBER CONTAINING A PLURALITY OF INNER LONGITUDINALLY EXTENDING GROOVES PARALLEL WITH THE AXIS OF THE TUBULAR MEANS AND HAVING RADIALLY EXTENDING WALLS FORMING FINS FOR MAKING CONTACT WITH THE SURFACE OF SAID PERMEABLE INNER MEANS, SAID OUTER MEMBER PERMITTING THE FLOW THROUGH THE GROOVES OF A WASHING STREAM IN A MANNER COUNTER TO THE FLOW OF THE DIFFUSABLE MATERIAL IN THE INNER MEANS.
References Cited (Backward Citations)
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US2276986A
Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |