US2687445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery separator
Assignee: Dewey and Almy Chemical Co
•
Filing: 1950-04-11
•
Granted: 1954-08-24
•
Expires: 1970-04-11
Abstract
No abstract record available.
Inventors
- 👤 Merrill Edward Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:20
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/446; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A PLATE SEPARATOR FOR STORAGE BATTERIES FORMED OF A WATER-LAID FELT IMPREGNATED WITH A SYNTHETIC ACID RESISTANT THERMOSET RESIN, SAID RESIN BONDING THE FIBERS AND MAKING THE SAME ACID RESISTANT AND BEING DISTRIBUTED THROUGHOUT THE ENTIRE FELT, SAID FELT HAVING PORTIONS UPTHRUST THEREFROM AND FORMING INTEGRAL RIBS EXTENDING ACROSS THE SEPARATOR, SAID RIBS HAVING A UNIFORM HEIGHT AND BEING DIMENSIONALLY STABLE UNDER CONDITIONS OF USE THAT PORTION OF THE FELT CONTAINED IN THE INTEGRAL RIBS HAVING A GREATER COMPACTNESS THAN THE FELT IN THE REMAINING, CURRENT CARRYING AREAS OF THE SEPARATOR, THE RIBBED AREAS ONLY HAVING BEEN CURED UNDER BOTH HEAT AND PRESSURE.
Claim 2
Dependent Claim
103 words
A PLATE SEPARATOR FOR STORAGE BATTERIES FORMED OF A WATER-LAID FELT IMPREGNATED WITH A SYNTHETIC ACID RESISTANT THERMOSET RESIN, SAID RESIN BONDING THE FIBERS AND MAKING THE SAME ACID RESISTANT AND BEING DISTRIBUTED THROUGHOUT THE ENTIRE FELT, SAID FELT HAVING PORTIONS UPTHRUST THEREFROM AND FORMING INTEGRAL RIBS EXTENDING ACROSS THE SEPARATOR, SAID RIBS HAVING A UNIFORM HEIGHT AND BEING DIMENSIONALLY STABLE UNDER CONDITIONS OF USE THAT PORTION OF THE FELT CONTAINED IN THE INTEGRAL RIBS HAVING A GREATER COMPACTNESS THAN THE FELT IN THE REMAINING, CURRENT CARRYING AREAS OF THE SEPARATOR, THE RIBBED AREAS ONLY HAVING BEEN CURED UNDER BOTH HEAT AND PRESSURE.
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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) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |