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Patent US2816862A successfully refreshed from Google Patents.
US2816862A
Expired / Lapsed
US
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Electrodialyzers
Assignee: Individual
•
Filing: 1954-04-16
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Granted: 1957-12-17
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Expires: 1974-04-16
Abstract
No abstract record available.
Inventors
- 👤 Marchand John Felix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:49
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/422; B01D61/44; B01D61/46; B01D2313/00; B01D2313/10; B01D2313/12; B01D2313/14; B01D2313/146
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A COAXIAL CONTERCURRENT ELECTRODIALYZER COMPRISING AN INNER ELECTRO-CONDUCTING CORE, A CONTINUOUS TUBE OF A CELLULOSE DERIVATIVE SPATIALLY SURROUNDING SAID CORE AND CONTAINED WITHIN AN INTERNALLY RADIALLY RIBBED JACKET OF RELATIVELY IMPERMEABLE ELECTRO-CONDUCTIVE MATERIAL, SAID RIBS FORMING CONTINUOUS LONGITUDINAL CHANNELS AND HAVING EDGES FORMING CONTACT WITH THE PERIPHERY OF THE TUBE WHEN EXPANDED.
Claim 2
Dependent Claim
52 words
A COAXIAL CONTERCURRENT ELECTRODIALYZER COMPRISING AN INNER ELECTRO-CONDUCTING CORE, A CONTINUOUS TUBE OF A CELLULOSE DERIVATIVE SPATIALLY SURROUNDING SAID CORE AND CONTAINED WITHIN AN INTERNALLY RADIALLY RIBBED JACKET OF RELATIVELY IMPERMEABLE ELECTRO-CONDUCTIVE MATERIAL, SAID RIBS FORMING CONTINUOUS LONGITUDINAL CHANNELS AND HAVING EDGES FORMING CONTACT WITH THE PERIPHERY OF THE TUBE WHEN EXPANDED.
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) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |