US3022366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery separator and manufacture thereof
Assignee: PPG Industries Inc
•
Filing: 1955-03-30
•
Granted: 1962-02-20
•
Expires: 1975-03-30
Abstract
No abstract record available.
Inventors
- 👤 Thomas F Kilroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:34
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/44; H01M50/431; H01M50/434; H01M50/437; H01M50/449; H01M50/489; H01M50/491; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
121 words
A BATTERY SEPARATOR COMPRISING A SINGLE, INTEGRAL, MULTILAYER, UNWOVEN MAT OF GLASS FIBERS WHEREIN THE FIBERS OF EACH LAYER ARE SUBSTANTIALLY PARALLEL TO EACH OTHER AND EXTEND SUBSTANTIALLY COMPLETELY ACROSS THE MAT, THE FIBERS IN EACH LAYER CROSSING AND INTERTWINING WITH THE FIBERS IN EACH ADJACENT LAYER AT AN ANGLE BETWEEN 60 AND 90* AND THE FIBERS OF THE LAYERS ADJACENT AT LEAST ONE MAJOR SURFACE OF THE MAT BEING FINER AND MORE DENSELY ASSOCIATED THAN THE FIBERS IN OTHER LAYERS OF THE MAT, AND A MICROPOROUS LAYER ADHERED TO BUT NOT SUBSTANTIALLY IMPREGNATING SAID MAJOR SURFACE, THE MICROPOROUS LAYER COMPRISING FINELY DIVIDED PARTICLES AND A BINDER THEREFOR, SAID PARTICLES AND BINDER BEING INERT WITH RESPECT TO BATTERY COMPONENTS AND REACTIONS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |