US3403252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air processing apparatus and ion generator comprising an electromagnetic radiation source and a stable electron emitting photosensitive member
Assignee: Philips North America LLC
•
Filing: 1960-02-29
•
Granted: 1968-09-24
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Expires: 1980-02-29
Abstract
No abstract record available.
Inventors
- 👤 Nagy Rudolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:47
CPC Classifications
H; H01; H01T; H01T23/00; A; A61; A61L; A61L9/00; A61L9/16; A61L9/22; F; F24; F24F; F24F8/00; F24F8/10; F24F8/192; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2732501A
Cited
US1965187A
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US2271792A
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US2603757A
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US2739084A
Cited
US2727173A
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US2702862A
Cited
US2941265A
Cited
US3072978A
Cited
US3047718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |