US2592396A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-air furnace, particularly of the forced-draft type
Assignee: Perfection Stove Co
•
Filing: 1948-01-23
•
Granted: 1952-04-08
•
Expires: 1968-01-23
Abstract
No abstract record available.
Inventors
- 👤 John A Dahlstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:02
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2116873A
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US1256328A
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US1782530A
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US1834288A
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US2089407A
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US2292082A
Cited
US2383431A
Cited
US2373900A
Cited
US2378485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |