US2961941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grease extracting attachment for ventilators for kitchen ranges
Assignee: DOHRMANN HOTEL SUPPLY CO
•
Filing: 1958-01-06
•
Granted: 1960-11-29
•
Expires: 1978-01-06
Abstract
No abstract record available.
Inventors
- 👤 Graswich Edward
- 👤 Jack W Cedarquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:12
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US821416A
Cited
US1898821A
Cited
US2077496A
Cited
US2182106A
Cited
US2279791A
Cited
US2657626A
Cited
US2813477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |