Patent US3128378A successfully refreshed from Google Patents.
US3128378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Negative ion generator using an ultraviolet source to irradiate electrically conductive material
Assignee: Dynamics Corp of America
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Filing: 1960-10-04
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Granted: 1964-04-07
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Expires: 1980-10-04
Abstract
No abstract record available.
Inventors
- 👤 Charles L Allen
- 👤 Allen R Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:27
CPC Classifications
H; H01; H01T; H01T23/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
72 words
A NEGATIVE ION GENERATOR COMPRISING A HOUSING HAVING A PASSAGE THERETHROUGH, A FIRST ELECTRICALLY CONDUCTIVE METALLIC SCREEN WITHIN SAID PASSAGE AT ONE END OF SAID HOUSING AND SUBSTANTIALLY CONVERING ONE END OF SAID PASSAGE, A FAN WTIHIN SAID PASSAGE AT THE OTHER END OF SAID HOUSING FOR FORCING AIR PAST SAID SCREEN, AN ULTRAVIOLET LIGHT SOURCE BETWEEN SAID FAN AND SAID FIRST SCREEN, AND A SECOND ELECTRICALLY CONDUCTIVE SCRREEN BETWEEN SAID FAN
References Cited (Backward Citations)
US2732501A
Cited
FR840359A
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US2449681A
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US2576399A
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US2533690A
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US2723349A
Cited
US2898498A
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) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |