Patent US2694971A successfully refreshed from Google Patents.
US2694971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air circulator
Assignee: Individual
•
Filing: 1950-09-11
•
Granted: 1954-11-23
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Expires: 1970-09-11
Abstract
No abstract record available.
Inventors
- 👤 John S Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:02
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)
US1673072A
Cited
US1913980A
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US2052596A
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US2134142A
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US2215901A
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US2217944A
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US2197679A
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US2275295A
Cited
US2352485A
Cited
US2334056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |