US2774108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making low-resistance ion-exchange membranes
Assignee: Gulf Research and Development Co
•
Filing: 1952-09-16
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Granted: 1956-12-18
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Expires: 1972-09-16
Abstract
No abstract record available.
Inventors
- 👤 Malcolm Robert Jesse Wyllie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:33
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2275; C08J2325/00; C08J2325/02; C08J2325/04; C08J2383/00; C08J2383/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS OF PREPARING AN ELECTROLYTICALLY-CONDUCTING MEMBRANE HAVING ION-EXCHANGE PROPERTIES WHICH COMPRISES COMPACTING A FINELY-DIVIDED ION-EXCHANGE MATERIAL TO REDUCE TTHE INTERSTITIAL VOIDS BETWEEN PARTICLES TO LESS THAN 25 PERCENT OF THE TOTAL VOLUME, AND, WHILE MAINTAINING THE PARTICLES IN COMPACTED FORM, EVACUATING THE INTERSTITIAL VOIDS BETWEEN SAID COMPACTED PARTICLES, FILLING THE INTERSTITIAL VOIDS WITH AN ELECTRICALLY-INSULATING POLYMERIZABLE RESINOUS LIQUID, AND EFFECTING POLYMERZIATION OF SAID LIQUID.
Claim 2
Dependent Claim
65 words
A PROCESS OF PREPARING AN ELECTROLYTICALLY-CONDUCTING MEMBRANE HAVING ION-EXCHANGE PROPERTIES WHICH COMPRISES COMPACTING A FINELY-DIVIDED ION-EXCHANGE MATERIAL TO REDUCE TTHE INTERSTITIAL VOIDS BETWEEN PARTICLES TO LESS THAN 25 PERCENT OF THE TOTAL VOLUME, AND, WHILE MAINTAINING THE PARTICLES IN COMPACTED FORM, EVACUATING THE INTERSTITIAL VOIDS BETWEEN SAID COMPACTED PARTICLES, FILLING THE INTERSTITIAL VOIDS WITH AN ELECTRICALLY-INSULATING POLYMERIZABLE RESINOUS LIQUID, AND EFFECTING POLYMERZIATION OF SAID LIQUID.
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) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |