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Patent US3084091A successfully refreshed from Google Patents.
US3084091A
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Method of making battery separator from plastic encapsulated fibers
Assignee: Uniroyal Inc
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Filing: 1960-03-04
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Granted: 1963-04-02
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Expires: 1980-03-04
Abstract
No abstract record available.
Inventors
- 👤 Roy G Volkman
- 👤 Theung Wong Ting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:52
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/20; B29C48/00; B29C48/15; B29C48/154; B29C70/00; B29C70/58; D; D21; D21H; D21H11/00; D21H11/16; D21H5/00; D21H5/12; D21H5/14; D21H5/141; D21H5/143; H; H01; H01M; H01M50/00; H01M50/40; H01M50/403; H01M50/406; H01M50/409; H01M50/411; H01M50/414; H01M50/417; H01M50/429; H01M50/44; B29C48/03; B29C48/07; B29C48/08; B29C48/13; H01M50/4295; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A METHOD OF MAKING A MICROPOROUS BATTERY SEPARATOE COMPRISING PREPARING AN AQUEOUS SLURRY OF PLASTICENCAPSULATED FIBERS, CAUSING SUCH SLURRY TO FLOW ONTO AN ADVANCING CONVEYING MEANS, WHEREBY A THIN LAYER OF PLASTIC-ENCAPULATED FIBERS IS DEPOSITED ON SUCH CONVEYING MEANS, THE SAID CONVEYING MEANS SERVING AS A TEMPERARY SUPPORT FOR THE RESULTING SHEET OF FIBERS, SQUEEZING EXCESS WATER OUT OF THE SHEET OF FIBERS, PASSING THE THUS-SUPPORTED SHEET THROUGH A ZONE MAINTAINED AT A TEMPERATURE OF FROM 330* TO 500*F. TO REMOVE THE REMAINING WATER AND PARTIALLY FUSE THE PLASTIC COATING ON THE FIBERS WITHOUT COMPRESSING THE SHEET, PULLING THE SHEET FROM THE CONVEYING MEANS UNDER TENSION INTO THE NIP OF SPACED PINCH ROLLS HEATED TO A TEMPERATURE SLIGHTLY BELOW THE MELTING POINT OF THE PLASTIC WHEREBY THE SHEET IS COMPRESSED TO A DESIRED THICKNESS AND THE PLASTIC COATING ON THE FIBERS IS FURTHER FUSED TO FORM A STRONG, INTEGRAL SHEET, AND THEREAFTER COOLING THE SHEET.
Claim 2
Independent Claim
155 words
A METHOD OF MAKING A MICROPOROUS BATTERY SEPARATOE COMPRISING PREPARING AN AQUEOUS SLURRY OF PLASTICENCAPSULATED FIBERS, CAUSING SUCH SLURRY TO FLOW ONTO AN ADVANCING CONVEYING MEANS, WHEREBY A THIN LAYER OF PLASTIC-ENCAPULATED FIBERS IS DEPOSITED ON SUCH CONVEYING MEANS, THE SAID CONVEYING MEANS SERVING AS A TEMPERARY SUPPORT FOR THE RESULTING SHEET OF FIBERS, SQUEEZING EXCESS WATER OUT OF THE SHEET OF FIBERS, PASSING THE THUS-SUPPORTED SHEET THROUGH A ZONE MAINTAINED AT A TEMPERATURE OF FROM 330* TO 500*F. TO REMOVE THE REMAINING WATER AND PARTIALLY FUSE THE PLASTIC COATING ON THE FIBERS WITHOUT COMPRESSING THE SHEET, PULLING THE SHEET FROM THE CONVEYING MEANS UNDER TENSION INTO THE NIP OF SPACED PINCH ROLLS HEATED TO A TEMPERATURE SLIGHTLY BELOW THE MELTING POINT OF THE PLASTIC WHEREBY THE SHEET IS COMPRESSED TO A DESIRED THICKNESS AND THE PLASTIC COATING ON THE FIBERS IS FURTHER FUSED TO FORM A STRONG, INTEGRAL SHEET, AND THEREAFTER COOLING THE SHEET.
References Cited (Backward Citations)
US2374540A
Cited
US2430868A
Cited
US2482062A
Cited
GB717814A
Cited
US2739058A
Cited
GB816867A
Cited
US2978529A
Cited
US2973398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |