US2694744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making separators for electric storage batteries and product obtained thereby
Assignee: Flexa Industria Materie Plastiche SpA
•
Filing: 1951-06-11
•
Granted: 1954-11-16
•
Expires: 1971-06-11
Abstract
No abstract record available.
Inventors
- 👤 Tamburini Bruno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:40
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/44; H01M50/431; H01M50/434; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
70 words
A SEPARATOR FOR ELECTRIC STORAGE BATTERIES IN THE FORM OF A COMPACT, RESISTANT, ELASTIC BODY AND FORMED FROM A WATER PASTE OF VERY FINE GRAINS OF A COLLOIDAL SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF BENTONITE AND SILICA GEL MIXED WITH A PLASTIC BINDER, THE MIXTURE COMPLETELY SURROUNDING AND FILLING A SUPPORT OF FIBROUS INERT MATERIAL, THE SEPARATOR WHEN SOAKED BY THE ELECTROLYTE BEING CHARACTERIZED BY THE PROPERTY OF ION-PERMEABILITY.
References Cited (Backward Citations)
US1206983A
Cited
US1500220A
Cited
US1577450A
Cited
US1744256A
Cited
US1879562A
Cited
US2117371A
Cited
US2230271A
Cited
GB537377A
Cited
US2306781A
Cited
US2428470A
Cited
US2397453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |