Patent US2665841A successfully refreshed from Google Patents.
US2665841A
Expired / Lapsed
US
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Air circulator
Assignee: J ALLEN MCMEEN
•
Filing: 1951-05-04
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Granted: 1954-01-12
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Expires: 1971-05-04
Abstract
No abstract record available.
Inventors
- 👤 Smith Rulo Wayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:26
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/0052; F04; F04D; F04D17/00; F04D17/08; F04D17/16; F04D17/165; F04D29/00; F04D29/08; F04D29/16; F04D29/161; F04D29/162; F04D29/40; F04D29/42; F04D29/4206; F04D29/4226; F04D29/4253; F16; F16D; F16D3/00; F16D3/50; F16D3/72; F16D3/74; Y; Y10; Y10T; Y10T403/00; Y10T403/45; Y10T403/453
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US717339A
Cited
US1862523A
Cited
US2037880A
Cited
US2228201A
Cited
US2297619A
Cited
US2265112A
Cited
US2414551A
Cited
US2562359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |