US2487233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making battery separators
Assignee: Uniroyal Inc
•
Filing: 1947-02-28
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Granted: 1949-11-08
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Expires: 1967-02-28
Abstract
No abstract record available.
Inventors
- 👤 Roscoe H Gerke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:31
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/006; B29C; B29C59/00; B29L; B29L2031/00; B29L2031/712
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1904268A
Cited
US2108023A
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US2030066A
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US2142445A
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US2318111A
Cited
US2414177A
Cited
US2422148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |