US2936328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery separator and method of making same
Assignee: Uniroyal Inc
•
Filing: 1958-02-26
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Granted: 1960-05-10
•
Expires: 1978-02-26
Abstract
No abstract record available.
Inventors
- 👤 Edward L Sillcox
- 👤 Harry S Witt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:20
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/30; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/429; H01M50/4295; H01M50/44; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A METHOD OF MAKING A LIQUID-PERMEABLE BATTERY SEPARATOR HAVING SPACED UPSTANDING RIBS TENACIOUSLY SELFADHERED TO A FLAT SHEET COMPOSED OF A SINGLE, BIBULOUS, RESIN-IMPREGNATED, FELTED CELLULOSIC FIBROUS SHEET WHICH COMPRISES DEPOSITING ON THE SURFACE OF SUCH FLAT, IMPREGNATED SHEET, A PLURALITY OF SPACED UPSTANDING RIBS FROM A THIXOTROPIC PASTE COMPRISING A MIXTURE OF A POROUS, WATER-SATURATED, PARTICULATE FILLER WHICH IS INERT TO BATTERY ACID AND A RESINOUS MATERIAL COMPRISING A PLASTISOL OF A POLUMER OF VINYL CHLORIDE, AND HEATING THE RIB SHEET AT A SUFFICIENTLY HIGH TEMPERATURE TO COMPLETE THE CURING OF THE RESIN IN SAID SHEET, TO CONVERT THE POLYMER OF VINYL CHLORIDE IN SAID RIBS TO A COHERENT, PERMEABLE MATRIX, AND TO DRIVE OUT THE WATER.
Claim 2
Independent Claim
118 words
A METHOD OF MAKING A LIQUID-PERMEABLE BATTERY SEPARATOR HAVING SPACED UPSTANDING RIBS TENACIOUSLY SELFADHERED TO A FLAT SHEET COMPOSED OF A SINGLE, BIBULOUS, RESIN-IMPREGNATED, FELTED CELLULOSIC FIBROUS SHEET WHICH COMPRISES DEPOSITING ON THE SURFACE OF SUCH FLAT, IMPREGNATED SHEET, A PLURALITY OF SPACED UPSTANDING RIBS FROM A THIXOTROPIC PASTE COMPRISING A MIXTURE OF A POROUS, WATER-SATURATED, PARTICULATE FILLER WHICH IS INERT TO BATTERY ACID AND A RESINOUS MATERIAL COMPRISING A PLASTISOL OF A POLUMER OF VINYL CHLORIDE, AND HEATING THE RIB SHEET AT A SUFFICIENTLY HIGH TEMPERATURE TO COMPLETE THE CURING OF THE RESIN IN SAID SHEET, TO CONVERT THE POLYMER OF VINYL CHLORIDE IN SAID RIBS TO A COHERENT, PERMEABLE MATRIX, AND TO DRIVE OUT THE WATER.
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) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |