Patent US2423656A successfully refreshed from Google Patents.
US2423656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective-cover for smoke pipes
Assignee: —
•
Filing: —
•
Granted: 1947-07-08
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Expires: 1964-07-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:42
CPC Classifications
—
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1409324A
Cited
US1983958A
Cited
US1988642A
Cited
US2039886A
Cited
GB189617581A
Cited
US700762A
Cited
US717592A
Cited
US1154502A
Cited
US1487709A
Cited
US1636610A
Cited
US1698937A
Cited
US1862227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-07 | 1951-01-06 | 1951-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-07 | 1955-01-06 | 1955-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-07 | 1959-01-06 | 1959-07-08 | $7700.00 | Window Closed / Lapsed |