US2933240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air circulating fan for heating systems
Assignee: Controls Company of America
•
Filing: 1955-08-31
•
Granted: 1960-04-19
•
Expires: 1975-08-31
Abstract
No abstract record available.
Inventors
- 👤 James L Breese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:17
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/64; F04D29/644; F04D29/646
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US444807A
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GB190419334A
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US785004A
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US1222837A
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US1280960A
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DE392809C
Cited
US1506522A
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US1605253A
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US1687718A
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US1845638A
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US1947941A
Cited
US2186674A
Cited
US2280090A
Cited
CH223834A
Cited
US2434130A
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US2538196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |