US2825102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air purifier
Assignee: WESIX ELECTRIC HEATER CO
•
Filing: 1955-04-04
•
Granted: 1958-03-04
•
Expires: 1975-04-04
Abstract
No abstract record available.
Inventors
- 👤 William W Hicks
- 👤 John C Beckett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:31
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/017; F; F24; F24F; F24F8/00; F24F8/10; F24F8/192; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1807076A
Cited
US2085573A
Cited
US2129783A
Cited
US2389698A
Cited
US2477964A
Cited
US2449681A
Cited
US2527013A
Cited
US2639972A
Cited
US2637408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |