US2452240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chimney cap
Assignee: Individual
•
Filing: 1945-02-20
•
Granted: 1948-10-26
•
Expires: 1965-02-20
Abstract
No abstract record available.
Inventors
- 👤 John A Hurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:35
CPC Classifications
F; F23; F23L; F23L17/00; F23L17/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US292760A
Cited
US865023A
Cited
GB216663A
Cited
AU687227A
Cited
GB335886A
Cited
US1864555A
Cited
US2311915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-26 | 1952-04-26 | 1952-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-26 | 1956-04-26 | 1956-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-26 | 1960-04-26 | 1960-10-26 | $7700.00 | Window Closed / Lapsed |