Patent US3425334A successfully refreshed from Google Patents.
US3425334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat arresting grease extracting filter assembly
Assignee: Air Maze Corp
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Filing: 1967-05-03
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Granted: 1969-02-04
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Expires: 1987-05-03
Abstract
No abstract record available.
Inventors
- 👤 Richard E Brown
- 👤 William A Janson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:59
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/20; F24C15/2035; B; B01; B01D; B01D46/00; B01D46/10
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) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |