US2502614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for purifying solutions
Assignee: Akzo Nobel UK PLC
•
Filing: 1944-06-17
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Granted: 1950-04-04
•
Expires: 1964-06-17
Abstract
No abstract record available.
Inventors
- 👤 Zender Justin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:04
CPC Classifications
B; B01; B01J; B01J41/00; B01D; B01D61/00; B01D61/24; B01D61/28; B01D69/00; B01D69/12; B01D69/1216; B01D71/00; B01D71/06; B01D71/08; B01D71/10; C; C13; C13B; C13B35/00; C13B35/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A DIALYZING APPRATUS COMPRISING TWO CHAMBERS SEPARATED BY A COMPOSITE LAMINAR MEMBRANCE COMPRISING OUTER SEMI-PERMEABLE LAMINAE AND AT LEAST ONE LAYER OF A SOLID, WATER-INSOLUBLE IONREMOVING MATERIAL THEREBETWEEN, CONDUIT MEANS FOR INTRODUCING AND REMOVING A LIQUID TO AND FROM ONE OF THE CHAMBERS, AND CONDUIT MEANS FOR INTRODUCING AND REMOVING A LIQUID TO BE DIALYZED TO AND FROM THE OTHER CHAMBER.
Claim 2
Dependent Claim
61 words
A DIALYZING APPRATUS COMPRISING TWO CHAMBERS SEPARATED BY A COMPOSITE LAMINAR MEMBRANCE COMPRISING OUTER SEMI-PERMEABLE LAMINAE AND AT LEAST ONE LAYER OF A SOLID, WATER-INSOLUBLE IONREMOVING MATERIAL THEREBETWEEN, CONDUIT MEANS FOR INTRODUCING AND REMOVING A LIQUID TO AND FROM ONE OF THE CHAMBERS, AND CONDUIT MEANS FOR INTRODUCING AND REMOVING A LIQUID TO BE DIALYZED TO AND FROM THE OTHER CHAMBER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |