US2442201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating and cooling system
Assignee: Individual
•
Filing: 1942-03-04
•
Granted: 1948-05-25
•
Expires: 1962-03-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert S Elberty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:30
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0089; F24D; F24D3/00; F24D3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1406852A
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US1718533A
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US1827926A
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US1918778A
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US2000539A
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US1995481A
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FR829601A
Cited
US2207979A
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US2235692A
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US2240951A
Cited
US2289196A
Cited
US2318706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-25 | 1951-11-24 | 1952-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-25 | 1955-11-24 | 1956-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-25 | 1959-11-24 | 1960-05-25 | $7700.00 | Window Closed / Lapsed |