Patent US2693247A successfully refreshed from Google Patents.
US2693247A
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Method of cooling and dehumidifying compressed gases
Assignee: Niagara Blower Co
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Filing: 1951-09-29
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Granted: 1954-11-02
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Expires: 1971-09-29
Abstract
No abstract record available.
Inventors
- 👤 Martin H Olstad
- 👤 Raymond G Graeter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:51
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F3/1417; B; B01; B01D; B01D53/00; B01D53/26; F25; F25B; F25B23/00; F24F2003/144
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1905068A
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US2017027A
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US2199967A
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US2225959A
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US2192126A
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US2367695A
Cited
US2420993A
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US2568891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |