US2748688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grease extracting vent
Assignee: Individual
•
Filing: 1953-09-24
•
Granted: 1956-06-05
•
Expires: 1973-09-24
Abstract
No abstract record available.
Inventors
- 👤 William A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:51
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)
US689104A
Cited
GB237665A
Cited
GB323049A
Cited
US2226641A
Cited
GB556361A
Cited
US2375608A
Cited
FR901740A
Cited
US2564074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |