US2662929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing battery separators and the like
Assignee: LEE M CALDWELL
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Filing: 1952-08-23
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Granted: 1953-12-15
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Expires: 1972-08-23
Abstract
No abstract record available.
Inventors
- 👤 Harold F Dague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:46
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/461; C; C08; C08J; C08J9/00; C08J9/24; H; H01; H01M; H01M50/00; H01M50/40; H01M50/403; H01M50/409; H01M50/411; H01M50/414; H01M50/417; H01M50/489; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A METHOD OF MAKING POROUS, ACID-RESISTANT AND HOMOGENEOUS ARTICLES, ADAPTED FOR USE AS BATTERY SEPARATORS AND THE LIKE, WHICH COMPRISES: CONTACTING A MOVING STREAM OF SOLID, GOBULAR PARTICLES OF A POLYMERIZED RESIN WITH FROM ABOUT 0.75% TO ABOUT 5% OF A LIQUID SOFTENING AGENT BY WEIGHT OF THE RESIN PARTICLES FOR A TIME SUFFI-
Claim 2
Independent Claim
54 words
A METHOD OF MAKING POROUS, ACID-RESISTANT AND HOMOGENEOUS ARTICLES, ADAPTED FOR USE AS BATTERY SEPARATORS AND THE LIKE, WHICH COMPRISES: CONTACTING A MOVING STREAM OF SOLID, GOBULAR PARTICLES OF A POLYMERIZED RESIN WITH FROM ABOUT 0.75% TO ABOUT 5% OF A LIQUID SOFTENING AGENT BY WEIGHT OF THE RESIN PARTICLES FOR A TIME SUFFI-
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) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |