Patent US3433146A successfully refreshed from Google Patents.
US3433146A
Expired / Lapsed
US
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Grease extracting ventilating apparatus
Assignee: Individual
•
Filing: 1966-11-30
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Granted: 1969-03-18
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Expires: 1986-11-30
Abstract
No abstract record available.
Inventors
- 👤 Kenneth Sinclair Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:00
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/20; Y; Y10; Y10S; Y10S55/00; Y10S55/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2259626A
Cited
US2527139A
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US2648395A
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FR1048157A
Cited
US2889007A
Cited
US3065687A
Cited
US3055285A
Cited
US3221635A
Cited
US3260189A
Cited
US3364664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |