Patent US4595000A successfully refreshed from Google Patents.
Patent US1471112A successfully refreshed from Google Patents.
US1471112A
Expired / Lapsed
US
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Apparatus for cooling air
Assignee: BF Sturtevant Co
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Filing: 1919-12-13
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Granted: 1923-10-16
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Expires: 1939-12-13
Abstract
No abstract record available.
Inventors
- 👤 Frederic R Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:55
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0007; F24F6/00; F24F6/12; F24F6/14; F24F2006/146; Y; Y10; Y10S; Y10S261/00; Y10S261/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1926-10-15 | 1927-04-16 | 1927-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-10-15 | 1931-04-16 | 1931-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-10-15 | 1935-04-16 | 1935-10-16 | $7700.00 | Window Closed / Lapsed |