US2960559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making heavy duty battery separator
Assignee: Riegel Paper Corp
•
Filing: 1957-04-17
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Granted: 1960-11-15
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Expires: 1977-04-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Donald G Magill
- 👤 Charles B Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:36
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/44; H01M50/411; H01M50/414; H01M50/429; H01M50/4295; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A SECONDARY TREATMENT FOR IMPROVING THE ABRASION RESISTANCE OF A PREVIOUSLY RESIN-IMPREGNATED BATTERY SEPARATOR PAPER WITHOUT SUBSTANTIALLY IMPAIRING ITS OHMIC RESISTANCE AND POROSITY CHARACTERISTICS, WHICH COMPRISES APPLYING TO AT LEAST ONE OF THE SURFACES OF SAID PREVIOUSLY IMPREGNATED PAPER A COATING SOLUTION CONTAINING A PH
Claim 2
Dependent Claim
45 words
A SECONDARY TREATMENT FOR IMPROVING THE ABRASION RESISTANCE OF A PREVIOUSLY RESIN-IMPREGNATED BATTERY SEPARATOR PAPER WITHOUT SUBSTANTIALLY IMPAIRING ITS OHMIC RESISTANCE AND POROSITY CHARACTERISTICS, WHICH COMPRISES APPLYING TO AT LEAST ONE OF THE SURFACES OF SAID PREVIOUSLY IMPREGNATED PAPER A COATING SOLUTION CONTAINING A PH
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) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |