US3490206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grease extractor for kitchen ventilating systems
Assignee: Cockle Ventilator Co Inc
•
Filing: 1967-10-02
•
Granted: 1970-01-20
•
Expires: 1987-10-02
Abstract
No abstract record available.
Inventors
- 👤 De Witt H Doane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:44
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/20; A; A62; A62C; A62C3/00; A62C3/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3242652A
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US3324629A
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US3304572A
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US3393497A
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US3376804A
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US3370404A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |