US1573406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined chimney, furnace, and ventilator
Assignee: Individual
•
Filing: 1925-02-12
•
Granted: 1926-02-16
•
Expires: 1945-02-12
Abstract
No abstract record available.
Inventors
- 👤 Lewis Edward Dudley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:07
CPC Classifications
F; F28; F28D; F28D21/00; F28D21/0001; F28D21/0003; F28D21/0005; F28D21/0008; F24; F24D; F24D5/00; F24D5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1929-02-15 | 1929-08-17 | 1930-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-02-15 | 1933-08-17 | 1934-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-02-15 | 1937-08-17 | 1938-02-16 | $7700.00 | Window Closed / Lapsed |