US2765975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ionic wind generating duct
Assignee: RCA Corp
•
Filing: 1952-11-29
•
Granted: 1956-10-09
•
Expires: 1972-11-29
Abstract
No abstract record available.
Inventors
- 👤 Nils E Lindenblad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:18
CPC Classifications
F; F04; F04D; F04D33/00; F04F; F04F7/00; H; H02; H02N; H02N3/00
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |