Patent US2199519A successfully refreshed from Google Patents.
US2199519A
Expired / Lapsed
US
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Electrolytic device
Assignee: SPRAGUE SPECIALTIES Co
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Filing: 1937-07-21
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Granted: 1940-05-07
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Expires: 1957-07-21
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Collins
- 👤 Jr Alexander Durant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:28
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/08; H01G9/12; H01M; H01M50/00; H01M50/30; H01M50/342; H01M50/375; 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) | 1943-05-07 | 1943-11-06 | 1944-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-05-07 | 1947-11-06 | 1948-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-05-07 | 1951-11-06 | 1952-05-07 | $7700.00 | Window Closed / Lapsed |