US3282825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodialysis process and apparatus using a helically formed membrane
Assignee: AMF Inc
•
Filing: 1963-04-03
•
Granted: 1966-11-01
•
Expires: 1983-04-03
Abstract
No abstract record available.
Inventors
- 👤 Brown Jerry Hugh
- 👤 Conning David Guy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:46
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; B01D61/46; B01D61/463; B01D63/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
57 words
IN AN ELECTRODIALYSIS APPARATUS, ION SELECTIVE MEMBRANE MATERIAL FORMED INTO A HELICAL CONSTRUCTION, A CYLINDRICAL COVER DISPOSED ABOUT SAID HELICAL CONSTRUCTION, AN INLET TUBE LEADING INSIDE SAID COVER AND AN OUTLET TUBE LEADING FROM SAID COVER, ELECFTRODES DISPOSED BEYOND THE ENDS OF SAID HELICAL CONSTRUCTION, SAID HELICAL CONSTRUCTION AND SAID CYLINDRICAL COVER DEFINING AT LEAST ONE HELICAL
References Cited (Backward Citations)
US410976A
Cited
US2741591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |