Patent US3417577A successfully refreshed from Google Patents.
US3417577A
Expired / Lapsed
US
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Room air purifier
Assignee: CLOYD D WALDRON
•
Filing: 1966-06-03
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Granted: 1968-12-24
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Expires: 1986-06-03
Abstract
No abstract record available.
Inventors
- 👤 Cloyd D Waldron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:42
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/04; F24F7/06; F24F7/065; F24F11/00; F24F11/0001; F24F2011/0002; Y; Y10; Y10S; Y10S165/00; Y10S165/909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3265129A
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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) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |