Patent US1393467A successfully refreshed from Google Patents.
US1393467A
Expired / Lapsed
US
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Process for producing separators
Assignee: Individual
•
Filing: 1918-12-13
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Granted: 1921-10-11
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Expires: 1938-12-13
Abstract
No abstract record available.
Inventors
- 👤 Charles J Thatcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:25
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/403; H01M50/409; H01M50/431; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1924-10-10 | 1925-04-11 | 1925-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-10-10 | 1929-04-11 | 1929-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-10-10 | 1933-04-11 | 1933-10-11 | $7700.00 | Window Closed / Lapsed |