US2646744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination heater outlet and air circulator
Assignee: Individual
•
Filing: 1949-04-23
•
Granted: 1953-07-28
•
Expires: 1969-04-23
Abstract
No abstract record available.
Inventors
- 👤 John S Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:18
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/0233; F28D1/024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1391645A
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US1510808A
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FR629559A
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US1645140A
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US1743994A
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US1875683A
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US1884094A
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US1825423A
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US2052596A
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US2134142A
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US2313676A
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US2352485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |