US3725130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making tubular battery electrode
Assignee: Tudor AB
•
Filing: 1971-04-12
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Granted: 1973-04-03
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Expires: 1991-04-12
Abstract
Abstract LEAD-ACID STORAGE BATTERY ELECTRODE OF THE TUBE PLATE TYPE HAVING A NOVEL SHEATH OF A GLASS FIBER FABRIC WHEREIN THE YARNS ARE HELD AGAINST SLIPPAGE BY ISLANDS OF A THERMOPLASTIC MATERIAL. THE SHEATH IS MADE BY PASSING A TUBE MADE OF GLASS FIBER YARNS OVER A MANDREL WHICH EXTENDS THROUGH A CHAMBER CONTAINING PULVERIZED PARTICLES OF PLASTIC MATERIAL. THE PARTICLES ARE BLOWN ON THE GLASS FIBER TUBE WHILE HEATED AND FORM SMALL ISLANDS OF PLASTIC MATERIAL WHEN COOLED WHICH IMPART THE NECESSARY ME- CHANICAL STRENGTH TO THE SHEATH WITHOUT SUBSTANTIAL REDUCTION IN POROSITY.
Inventors
- 👤 J Andersson
- 👤 K Lindbergh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:15
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/70; H01M4/76; H01M4/765; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/10; Y10T29/49; Y10T29/49002; Y10T29/49108
Claims Analysis
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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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |