Patent US2632638A successfully refreshed from Google Patents.
US2632638A
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Gas and liquid contact apparatus
Assignee: Hudson Engineering Corp
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Filing: 1949-03-26
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Granted: 1953-03-24
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Expires: 1969-03-26
Abstract
No abstract record available.
Inventors
- 👤 Nelson C Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:09
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/18; B01D3/20; B01D3/205; Y; Y10; Y10S; Y10S261/00; Y10S261/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US730627A
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US815031A
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US909650A
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US1141266A
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US1212199A
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US1562009A
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US1624793A
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US1744543A
Cited
US1865818A
Cited
US2052532A
Cited
US2191919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |