US3043977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device and method for producing negative ions
Assignee: PURITRON Corp
•
Filing: 1960-03-30
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Granted: 1962-07-10
•
Expires: 1980-03-30
Abstract
No abstract record available.
Inventors
- 👤 Harold J Morowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:12
CPC Classifications
H; H01; H01T; H01T23/00; F; F24; F24F; F24F8/00; F24F8/10; F24F8/192; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y10; Y10S; Y10S422/00; Y10S422/906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1310511A
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US1788553A
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US1965187A
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US2183387A
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US2717971A
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US2639972A
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US2739084A
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US2805344A
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US2890360A
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US2855641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |