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US2173249A
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Asymmetric electrode system
Assignee: Koninklijke Philips NV
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Filing: 1936-10-21
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Granted: 1939-09-19
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Expires: 1956-10-21
Abstract
No abstract record available.
Inventors
- 👤 Boer Jan Hendrik De
- 👤 Willem Christiaan Van Geel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:07
CPC Classifications
B; B31; B31C; B31C3/00; H; H10; H10D; H10D48/00; H10D48/01; H10D48/04; H10D48/043; H10P; H10P14/00; H10P14/20; H10P14/26; H10P14/263; H10P14/34; H10P14/3402; H10P14/3438; H10P14/38; H10P14/3802
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) | 1942-09-18 | 1943-03-20 | 1943-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-09-18 | 1947-03-20 | 1947-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-09-18 | 1951-03-20 | 1951-09-19 | $7700.00 | Window Closed / Lapsed |