US2598397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-cooling attachment for warm air furnace systems
Assignee: General Electric Co
•
Filing: 1949-10-05
•
Granted: 1952-05-27
•
Expires: 1969-10-05
Abstract
No abstract record available.
Inventors
- 👤 Samuel J Levine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:36
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US843909A
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US2011787A
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US1982305A
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US2001704A
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US2143356A
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US2131295A
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US2134498A
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US2238689A
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US2468626A
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US2474441A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |