US3376805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air circulation and filter system
Assignee: SHIRLEY C OAKLEY
•
Filing: 1966-05-09
•
Granted: 1968-04-09
•
Expires: 1986-05-09
Abstract
No abstract record available.
Inventors
- 👤 Daniel G Deddo
- 👤 Shirley C Oakley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:31
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D46/12; F; F24; F24F; F24F7/00; F24F7/04; F24F7/06; F24F8/00; F24F8/10; F24F8/108; Y; Y10; Y10S; Y10S55/00; Y10S55/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |