US2953622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery separators and production thereof
Assignee: American Marietta Co
•
Filing: 1957-02-26
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Granted: 1960-09-20
•
Expires: 1977-02-26
Abstract
No abstract record available.
Inventors
- 👤 Daniel M Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:59
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/44; H01M50/411; H01M50/429; H01M50/4295; H01M2300/00; H01M2300/0002; H01M2300/0005; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A BATTERY SEPARATOR CAPABLE OF BEING PERMEATED WITH BATTERY ACID, BUT CHEMICALLY RESISTANT THERETO, COMPRISING A POROUS FIBROUS SHEET, AND AT LEAST 18 POUNDS OF RESIN PER 100 POUNDS OF SAID INDIVIDUAL FIBROUS SHEET COATING THE FIBERS OF SAID SHEET, AND RESIN COMPRISING AS THE ESSENTIALLY RESIN COMPONENT THEREOF, A COPOLYMER OF VINYL CHLORIDE AND VINYLIDENE CHLORIDE IN PROPORTION BY WEIGHT OF 30% TO 75% VINYL CHLORIDE, THE BALANCE BEING VINYLDENE CHLORIDE, SAID RESIN-IMPREGNATED SHEET BEING CHARACTERIZED SUCH AIR PREMEABILITY THAT 200 CC. OF AIR AT A PRESSURE DIFFERENTIAL OF 0.044 POUND PER SQUARE INCH PASS THROUGH ONE SQUARE INCH OF THE IMPREGNATED SHEET IN ABOUT 2 TO ABOUT 10 SECONDS.
Claim 2
Dependent Claim
111 words
A BATTERY SEPARATOR CAPABLE OF BEING PERMEATED WITH BATTERY ACID, BUT CHEMICALLY RESISTANT THERETO, COMPRISING A POROUS FIBROUS SHEET, AND AT LEAST 18 POUNDS OF RESIN PER 100 POUNDS OF SAID INDIVIDUAL FIBROUS SHEET COATING THE FIBERS OF SAID SHEET, AND RESIN COMPRISING AS THE ESSENTIALLY RESIN COMPONENT THEREOF, A COPOLYMER OF VINYL CHLORIDE AND VINYLIDENE CHLORIDE IN PROPORTION BY WEIGHT OF 30% TO 75% VINYL CHLORIDE, THE BALANCE BEING VINYLDENE CHLORIDE, SAID RESIN-IMPREGNATED SHEET BEING CHARACTERIZED SUCH AIR PREMEABILITY THAT 200 CC. OF AIR AT A PRESSURE DIFFERENTIAL OF 0.044 POUND PER SQUARE INCH PASS THROUGH ONE SQUARE INCH OF THE IMPREGNATED SHEET IN ABOUT 2 TO ABOUT 10 SECONDS.
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) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |