Patent US3903515A successfully refreshed from Google Patents.
Patent US3227662A successfully refreshed from Google Patents.
US3227662A
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Antipolarization membrane having anionic and cationic areas
Assignee: Individual
•
Filing: 1960-10-10
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Granted: 1966-01-04
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Expires: 1980-10-10
Abstract
No abstract record available.
Inventors
- 👤 Kollsman Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:20
CPC Classifications
C; C25; C25B; C25B13/00; C25B13/04; C25B13/08; B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; B01D61/46; B01D61/463; B01D69/00; B01D69/02; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2275; B01D2325/00; B01D2325/18; B01D2325/26; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/08; C08J2325/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
AN ION SELECTIVE SELF-DEPOLARIZING MEMBRANE OF ION EXCHANGE RESIN MATERIAL COMPRISING CERTAIN SYNTHETIC ORGANIC POLYMER PARTICLES TO WHICH ANION EXCHANGE SITES ARE FIXEDLY ATTACHED, AND OTHER SYNTHETIC ORGANIC POLYMER PARTICLES TO WHICH CATION SITES ARE FIXEDLY ATTACHED, SAID TWO POLYMER PARTICLES BEING COMMINGLED UNIFORMLY THROUGHOUT THE ENTIRE THICKNESS OF THE MEMBRANE AND PRESENT IN UNEQUAL AMOUNTS IN SUCH RELATIVE PROPORTIONS THAT THE MEMBRANE CONDUCTANCE FOR MOBILE IONS OF ONE POLARITY EXCEEDS THE CONDUCTANCE FOR MOBILE IONS OF THE OPPOSITE POLARITY OVER THE ENTIRE PH RANGE FROM 1.1 TO 13 AT AN AQUEOUS SOLUTION CONCENTRATION OF 0.1 N, THE LESSER PARTICLES BEING PRESENT IN AN AMOUNT, IN TERMS OF WEIGHT, OF AT LEAST FIVE PERCENT OF THE PREDOMINANT PARTICLES.
Claim 2
Dependent Claim
118 words
AN ION SELECTIVE SELF-DEPOLARIZING MEMBRANE OF ION EXCHANGE RESIN MATERIAL COMPRISING CERTAIN SYNTHETIC ORGANIC POLYMER PARTICLES TO WHICH ANION EXCHANGE SITES ARE FIXEDLY ATTACHED, AND OTHER SYNTHETIC ORGANIC POLYMER PARTICLES TO WHICH CATION SITES ARE FIXEDLY ATTACHED, SAID TWO POLYMER PARTICLES BEING COMMINGLED UNIFORMLY THROUGHOUT THE ENTIRE THICKNESS OF THE MEMBRANE AND PRESENT IN UNEQUAL AMOUNTS IN SUCH RELATIVE PROPORTIONS THAT THE MEMBRANE CONDUCTANCE FOR MOBILE IONS OF ONE POLARITY EXCEEDS THE CONDUCTANCE FOR MOBILE IONS OF THE OPPOSITE POLARITY OVER THE ENTIRE PH RANGE FROM 1.1 TO 13 AT AN AQUEOUS SOLUTION CONCENTRATION OF 0.1 N, THE LESSER PARTICLES BEING PRESENT IN AN AMOUNT, IN TERMS OF WEIGHT, OF AT LEAST FIVE PERCENT OF THE PREDOMINANT PARTICLES.
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |