US2180798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic device
Assignee: SPRAGUE SPECIALTIES Co
•
Filing: 1936-07-20
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Granted: 1939-11-21
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Expires: 1956-07-20
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:04
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/04; H01G9/048; H01G9/055; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12333; Y10T428/1234; Y10T428/12431
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) | 1942-11-20 | 1943-05-22 | 1943-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-11-20 | 1947-05-22 | 1947-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-11-20 | 1951-05-22 | 1951-11-21 | $7700.00 | Window Closed / Lapsed |