US2481165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Down and cross draft heater including airtight ash pit
Assignee: Individual
•
Filing: 1949-02-02
•
Granted: 1949-09-06
•
Expires: 1969-02-02
Abstract
No abstract record available.
Inventors
- 👤 Bertrand A Landry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:33
CPC Classifications
F; F24; F24B; F24B5/00; F24B5/02; F24B5/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US552911A
Cited
US2403829A
Cited
US2456570A
Cited
US905366A
Cited
US1034799A
Cited
US1544582A
Cited
US1501847A
Cited
US1561497A
Cited
DE585289C
Cited
US2295781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-05 | 1953-03-07 | 1953-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-05 | 1957-03-07 | 1957-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-05 | 1961-03-07 | 1961-09-06 | $7700.00 | Window Closed / Lapsed |