US2818059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall furnace
Assignee: COMMONWEALTH CO
•
Filing: 1954-12-31
•
Granted: 1957-12-31
•
Expires: 1974-12-31
Abstract
No abstract record available.
Inventors
- 👤 Lynn B Cayot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:25
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1582657A
Cited
US1991449A
Cited
US2383431A
Cited
US2484457A
Cited
US2593759A
Cited
US2702539A
Cited
US2602441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |