US2862437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating device
Assignee: Smith Filter Corp
•
Filing: 1956-09-24
•
Granted: 1958-12-02
•
Expires: 1976-09-24
Abstract
No abstract record available.
Inventors
- 👤 Glenn O Smith
- 👤 Dallas G Reddick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:00
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/20; F24C15/2035; Y; Y10; Y10S; Y10S55/00; Y10S55/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US314121A
Cited
CH166701A
Cited
US2218330A
Cited
US2621755A
Cited
US2584613A
Cited
US2746449A
Cited
US2719476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |