US3271292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion exchange membranes and spacers and process of making them
Assignee: Individual
•
Filing: 1960-11-08
•
Granted: 1966-09-06
•
Expires: 1980-11-08
Abstract
No abstract record available.
Inventors
- 👤 Kollsman Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:45
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2275; C08J2325/00; C08J2325/02; C08J2325/04; C08J2375/00; C08J2375/04; C08J2375/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
AN ION CONDUCTIVE MEMBRANE SPACER OF SUBSTANTIALLY LATTICE TYPE FORM COMPOSED OF ANION EXCHANGE RESIN PARTICLES AND CATION EXCHANGE PARTICLES, BOTH TYPES OF PARTICLES BEING IN RANDOM ARRANGEMENT, AND PREDOMINANTLY IN THE SHAPE OF FIBERS HAVING A LENGTH EXCEEDING THREE TIMES THEIR MEAN DIAMETER.
Claim 2
Dependent Claim
44 words
AN ION CONDUCTIVE MEMBRANE SPACER OF SUBSTANTIALLY LATTICE TYPE FORM COMPOSED OF ANION EXCHANGE RESIN PARTICLES AND CATION EXCHANGE PARTICLES, BOTH TYPES OF PARTICLES BEING IN RANDOM ARRANGEMENT, AND PREDOMINANTLY IN THE SHAPE OF FIBERS HAVING A LENGTH EXCEEDING THREE TIMES THEIR MEAN DIAMETER.
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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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |