Patent US2731193A successfully refreshed from Google Patents.
US2731193A
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Air circulating fan construction and method of making the same
Assignee: HAYES IND Inc
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Filing: 1951-05-19
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Granted: 1956-01-17
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Expires: 1971-05-19
Abstract
No abstract record available.
Inventors
- 👤 Karl J Lall
- 👤 Beecher B Cary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:18
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/281; F04D29/40; F04D29/52; F04D29/522; F04D29/526; F04D29/60; F04D29/64; F04D29/644; F04D29/646; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49327
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US629121A
Cited
US1498790A
Cited
US1614190A
Cited
US1886683A
Cited
US2011298A
Cited
US2219499A
Cited
US2441239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |