US3228802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storage battery separator
Assignee: VARTA AG
•
Filing: 1960-02-12
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Granted: 1966-01-11
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Expires: 1980-02-12
Abstract
No abstract record available.
Inventors
- 👤 Rabl Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:46
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/442; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/489; H01M50/403; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN A UNITARY SINTERED MICROPOROUS SEPARATOR FOR STORAGE BATTERIES COMPRISING A PLURALITY OF SINTERED POROUS LAYERS OF THE SAME PARTICULATE RESIN MATERIAL, IN WHICH THE AVERAGE DIAMETERS OF THE PORES OF ADJACENT LAYERS ARE IN A RATIO OF AT LEAST 2 TO 1, THE IMPROVEMENT CONSISTING OF HAVING SINTERED ADJACENT LAYERS I WHICH THE AVERAGE PORE SIZE OF ONE LAYER IS IN THE RANGE OF ABOUT 20 MICRONS TO 1 MICRON, AND THE PORE SIZE OF THE OTHER LAYER IS IN THE RANGE OF ABOUT 100 MICRONS TO ABOUT 8 MICRONS.
Claim 2
Dependent Claim
91 words
IN A UNITARY SINTERED MICROPOROUS SEPARATOR FOR STORAGE BATTERIES COMPRISING A PLURALITY OF SINTERED POROUS LAYERS OF THE SAME PARTICULATE RESIN MATERIAL, IN WHICH THE AVERAGE DIAMETERS OF THE PORES OF ADJACENT LAYERS ARE IN A RATIO OF AT LEAST 2 TO 1, THE IMPROVEMENT CONSISTING OF HAVING SINTERED ADJACENT LAYERS I WHICH THE AVERAGE PORE SIZE OF ONE LAYER IS IN THE RANGE OF ABOUT 20 MICRONS TO 1 MICRON, AND THE PORE SIZE OF THE OTHER LAYER IS IN THE RANGE OF ABOUT 100 MICRONS TO ABOUT 8 MICRONS.
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |