US2249091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of electrolytic devices
Assignee: SPRAGUE SPECIALTIES Co
•
Filing: 1937-06-15
•
Granted: 1941-07-15
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Expires: 1957-06-15
Abstract
No abstract record available.
Inventors
- 👤 Robinson Preston
- 👤 Nazzewski Mathew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:08
CPC Classifications
H; H01; H01G; H01G9/00; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10S264/00; Y10S264/71; Y10T; Y10T29/00; Y10T29/43; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49169; Y10T29/49826; Y10T29/49863; Y10T29/49865; Y10T29/4987
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) | 1944-07-14 | 1945-01-13 | 1945-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-14 | 1949-01-13 | 1949-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-14 | 1953-01-13 | 1953-07-15 | $7700.00 | Window Closed / Lapsed |