US2041569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode system having unsymmetrical conductivity
Assignee: Koninklijke Philips NV
•
Filing: 1930-07-08
•
Granted: 1936-05-19
•
Expires: 1950-07-08
Abstract
No abstract record available.
Inventors
- 👤 Reerink Engbert Harmen
- 👤 Boer Jan Hendrik De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:55
CPC Classifications
H; H10; H10D; H10D99/00; H10D64/00; H10D64/20; H10D64/23; H10P; H10P95/00; H10W; H10W72/00; Y; Y10; Y10S; Y10S438/00; Y10S438/957
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1939-05-19 | 1939-11-18 | 1940-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-05-19 | 1943-11-18 | 1944-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-05-19 | 1947-11-18 | 1948-05-19 | $7700.00 | Window Closed / Lapsed |