Patent US3342719A successfully refreshed from Google Patents.
US3342719A
Expired / Lapsed
US
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Ion exchange membrane fabrication
Assignee: AMF Inc
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Filing: 1963-06-05
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Granted: 1967-09-19
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Expires: 1983-06-05
Abstract
No abstract record available.
Inventors
- 👤 Chen William Kwo-Wei
- 👤 Smith Richard Neilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:06
CPC Classifications
A; A23; A23L; A23L2/00; A23L2/70; A23L2/72; A23L2/74; B; B01; B01D; B01D63/00; B01D63/08; B01D63/081; B01D65/00; B01D65/003; C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; H; H01; H01M; H01M8/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
THE PROCESS OF MAKING A FLUID TREAMENT CELL FOR ELECTOCHEMCIAL APPARATUS COMPRISING THE STEPS OF FORMING A CELL FRAME WITH A LARGE CENTRAL OPENING, EXPANDING A STRIP OF MEMBRANE MATERIAL BY PLACING IT IN A BASIC SOLUTION OF ANHYDROUS ALCOHOL, ULTRASONICALLY SEALING THE ENDS OF THE EXPANDED STRIP OF MEMBRANE MATERIAL TO ONE EDGE OF THE CELL FRAME WITH THE MEMBRANE MATERIAL EXTENDING ABOUT THE CELL FRAME OVER THE LARGE CENTRAL OPENING, AND SHRINKING THE STRIP OF MEMBRANE MATERIAL TIGHTLY OVER THE LARGE CENTRAL OPENING BY IMMERSING THE CELL FRAME AND THE STRIP OF MEMBRANE MATERIAL IN A WATER SOLUTION.
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |