Patent US2800445A successfully refreshed from Google Patents.
US2800445A
Expired / Lapsed
US
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Anionic permselective membrane
Assignee: Veolia WTS Systems USA Inc
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Filing: 1952-04-24
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Granted: 1957-07-23
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Expires: 1972-04-24
Abstract
No abstract record available.
Inventors
- 👤 Clarke John Thacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:38
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2231; C08J5/2243; C08J2353/00; C08J2353/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
THE METHOD OF TRANSFERRING ANIONS FROM ONE SOLUTION TO ANOTHER TO THE SUBSTANTIAL EXCLUSION OF THE TRANSFERR OF CATIONS, COMPRISING SEPARATING THE SOLUTIONS BY A SOLID, INSOLUBLE, UNFRACTURED CONTINUOUS BARRIER HAVING AT LEAST TWO DIMENSIONS EACH IN EXCESS OF 0.25 INCCH, SAID BARRIER CONSISTING ESSENTIALLY OF AN INSOLUBLE INFUSIBLE HOMOGENEOUS POLYMERIZATE OF MONO- AND POLYVINYL AROMATIC GROUPS AND HAVING DISSOCIABLE QUATERNARY AMMONIUN GROUPS BOUND TO THE AROMATIC NUCLEI IN GEL RELATIONSHIP WITH ABOUT 20 TO ABOUT 70 PERCENT OF AN AQUEOUS SOLVATING LIQUID, BY VOLUME BASED ON TOTAL VOLUME OF THE BARRIER AS A CONTINUOUS PHASE, AND PASSING A DIRECT ELECTRIC CURRENT THROUGH SAID SOLUTIONS AND BARRIER IN SERIES THUS EFFECTING MIGRATION OF SAID ANIONS THROUGH SAID BARRIER.
Claim 2
Independent Claim
118 words
THE METHOD OF TRANSFERRING ANIONS FROM ONE SOLUTION TO ANOTHER TO THE SUBSTANTIAL EXCLUSION OF THE TRANSFERR OF CATIONS, COMPRISING SEPARATING THE SOLUTIONS BY A SOLID, INSOLUBLE, UNFRACTURED CONTINUOUS BARRIER HAVING AT LEAST TWO DIMENSIONS EACH IN EXCESS OF 0.25 INCCH, SAID BARRIER CONSISTING ESSENTIALLY OF AN INSOLUBLE INFUSIBLE HOMOGENEOUS POLYMERIZATE OF MONO- AND POLYVINYL AROMATIC GROUPS AND HAVING DISSOCIABLE QUATERNARY AMMONIUN GROUPS BOUND TO THE AROMATIC NUCLEI IN GEL RELATIONSHIP WITH ABOUT 20 TO ABOUT 70 PERCENT OF AN AQUEOUS SOLVATING LIQUID, BY VOLUME BASED ON TOTAL VOLUME OF THE BARRIER AS A CONTINUOUS PHASE, AND PASSING A DIRECT ELECTRIC CURRENT THROUGH SAID SOLUTIONS AND BARRIER IN SERIES THUS EFFECTING MIGRATION OF SAID ANIONS THROUGH SAID BARRIER.
References Cited (Backward Citations)
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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) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |