US2543137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery separator
Assignee: Texon Inc
•
Filing: 1946-04-12
•
Granted: 1951-02-27
•
Expires: 1966-04-12
Abstract
No abstract record available.
Inventors
- 👤 Jay J Uber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:56
CPC Classifications
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
107 words
A LIQUID PERMEABLE BATTERY SEPARATOR COMPRISING A PAPER BASE SHEET HAVING AN AIR PERMEABILITY BETWEEN ABOUT 4 AND 28 SECONDS AS DETERMINED WITH A GURLEY DENSOMETER, SAID SHEET BEING THOROUGHLY IMPREGNATED WITH A C-STAGE PHENOLFORMALDEHYDE RESIN, SAID RESIN BEING SUCH THAT WHILE IN THE A-STAGE IT IS DILUTABLE WITH AT LEAST 9 PARTS OF WATER FOR EACH PART OF RESIN WITHOUT PRECIPITATION OF THE SAID RESIN, THE RESIN BEING SO DISTRIBUTED OVER THE INTERIOR AND EXTERIOR SURFACES OF THE FIBERS OF THE PAPER AS TO PROTECT THE SAME AGAINST ATTACK BY THE BATTERY LIQUID BUT NOT TO MATERIALLY LESSEN THE AIR PERMEABILITY OF THE ORIGINAL BASE SHEET.
Claim 2
Dependent Claim
107 words
A LIQUID PERMEABLE BATTERY SEPARATOR COMPRISING A PAPER BASE SHEET HAVING AN AIR PERMEABILITY BETWEEN ABOUT 4 AND 28 SECONDS AS DETERMINED WITH A GURLEY DENSOMETER, SAID SHEET BEING THOROUGHLY IMPREGNATED WITH A C-STAGE PHENOLFORMALDEHYDE RESIN, SAID RESIN BEING SUCH THAT WHILE IN THE A-STAGE IT IS DILUTABLE WITH AT LEAST 9 PARTS OF WATER FOR EACH PART OF RESIN WITHOUT PRECIPITATION OF THE SAID RESIN, THE RESIN BEING SO DISTRIBUTED OVER THE INTERIOR AND EXTERIOR SURFACES OF THE FIBERS OF THE PAPER AS TO PROTECT THE SAME AGAINST ATTACK BY THE BATTERY LIQUID BUT NOT TO MATERIALLY LESSEN THE AIR PERMEABILITY OF THE ORIGINAL BASE SHEET.
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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) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |