US2858353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separator for alkaline batteries
Assignee: Ions Exchange and Chemical Corp
•
Filing: 1954-07-06
•
Granted: 1958-10-28
•
Expires: 1974-07-06
Abstract
No abstract record available.
Inventors
- 👤 Mendelsohn Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:13
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/429; H01M50/414; H01M2300/00; H01M2300/0002; H01M2300/0014; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A SEMI-PERMEABLE SHEET INCORPORATIONG A MIXTURE OF METHYL CELLULOSE AND AN ALKALI SALT OF A POLYMERIC COMPOUND SELECTED FROM THE GROUP WHICH CONSISTS OF ALGINIC ACID AND SULFONATED POLYSTYRENE.
Claim 2
Dependent Claim
29 words
A SEMI-PERMEABLE SHEET INCORPORATIONG A MIXTURE OF METHYL CELLULOSE AND AN ALKALI SALT OF A POLYMERIC COMPOUND SELECTED FROM THE GROUP WHICH CONSISTS OF ALGINIC ACID AND SULFONATED POLYSTYRENE.
References Cited (Backward Citations)
US2161561A
Cited
US2534336A
Cited
US2482062A
Cited
US2487106A
Cited
US2673887A
Cited
US2607809A
Cited
US2636851A
Cited
US2653987A
Cited
US2653985A
Cited
GB708350A
Cited
US2696515A
Cited
US2662929A
Cited
US2678961A
Cited
US2747009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |