US2359970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous condenser electrode
Assignee: Philips North America LLC
•
Filing: 1937-10-14
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Granted: 1944-10-10
•
Expires: 1957-10-14
Abstract
No abstract record available.
Inventors
- 👤 Richard U Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:12
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/04; H01G9/048; H01G9/052; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12153
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) | 1947-10-10 | 1948-04-10 | 1948-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-10-10 | 1952-04-10 | 1952-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-10-10 | 1956-04-10 | 1956-10-10 | $7700.00 | Window Closed / Lapsed |