US2631830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning apparatus
Assignee: Individual
•
Filing: 1949-03-17
•
Granted: 1953-03-17
•
Expires: 1969-03-17
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Carraway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:15
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/12; F24F6/14; Y; Y02; Y02B; Y02B30/00; Y02B30/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB190907080A
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US1264263A
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US1493525A
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US1656414A
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US1816828A
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US1766643A
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US1744826A
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US1849710A
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US1952269A
Cited
US2035628A
Cited
US2218198A
Cited
US2282622A
Cited
US2296930A
Cited
US2268219A
Cited
US2262542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |