US3417302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the production of unipolar ions in the air of a room
Assignee: HOLGER GEORGE LUEDER
•
Filing: 1967-06-27
•
Granted: 1968-12-17
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Expires: 1987-06-27
Abstract
No abstract record available.
Inventors
- 👤 Holger George Lueder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:34
CPC Classifications
H; H01; H01T; H01T23/00; A; A61; A61N; A61N1/00; A61N1/44; F; F24; F24F; F24F11/00; F24F11/88; F24F11/30; F24F2110/00; F24F2110/10; F24F2110/20; F24F8/00; F24F8/10; F24F8/192; F24F8/194; F24F8/30; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y10; Y10S; Y10S422/00; Y10S422/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |