US2011890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic device
Assignee: Koninklijke Philips NV
•
Filing: 1933-02-23
•
Granted: 1935-08-20
•
Expires: 1953-02-23
Abstract
No abstract record available.
Inventors
- 👤 Boessenkool Helmich Wolter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:35
CPC Classifications
C; C10; C10J; C10J3/00; H; H01; H01G; H01G9/00; H01G9/004; H01G9/08; H01G9/12; H01M; H01M50/00; H01M50/10; H01M50/147; H01M50/148; H01M50/154; H01M50/172; H01M50/174; H01M50/179; H01M50/30; H01M50/317; H01M50/325; H01M50/60; H01M50/609; H01M50/627; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S220/00; Y10S220/27
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) | 1938-08-19 | 1939-02-18 | 1939-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-08-19 | 1943-02-18 | 1943-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-08-19 | 1947-02-18 | 1947-08-20 | $7700.00 | Window Closed / Lapsed |