US2647158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making acid resisting microporous material for storage battery separators
Assignee: Individual
•
Filing: 1948-08-17
•
Granted: 1953-07-28
•
Expires: 1968-08-17
Abstract
No abstract record available.
Inventors
- 👤 Booth Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:44
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/44; D; D21; D21J; D21J1/00; D21J1/08; H01M50/411; H01M50/429; H01M50/4295; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
122 words
METHOD OF MANUFACTURING MICRO-POROUS MATERIAL FOR USE IN CONTRUCTING SEPARATORS FOR A STORAGE BATTERY, WHICH COMPRISES THE STEPS OF TREATING A SHREDDED WOOD WITH A ALKALI TO SOFTEN AND LOOSEN THE FIBERS THEREOF AND TO REMOVE SUBSTANCES THAT WOULD BE DELETERIOUS TO THE PLATES OF A STORAGE BATTERY, CONVERTING THE SHREDDED WOOD INTO A FINE PULP, MIXING THE WOOD PULP IN THE WET CONDITION WITH A WATER-SOLUBLE SYNTHETIC RESIN CAPABLE OF BEING POLYMERISED TO FROM AN ACID-RESISTING POLYMER, SAID WATER-SOLUBLE SYNTHETIC RESIN BEING INCLUDED IN A PROPORTION NOT EXCEEDING 5 PARTS BY VOLUME OR SYNTHETIC RESIN TO 150 PARTS BY VOLUME OF WOOD PULP, DYRING THE MIXTURE TO FROM A SOLID DRY MASS, AND THEREAFTER HEAT TREATING IT TO POLYMERISE THE RESIN.
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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) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |