US2579203A
Expired / Lapsed
US
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Gas-liquid contacting apparatus
Assignee: Stratford Engineering Corp
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Filing: 1948-11-10
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Granted: 1951-12-18
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Expires: 1968-11-10
Abstract
No abstract record available.
Inventors
- 👤 David H Putney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:51
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/20; B01J8/22; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/231; B01F23/23105; B01F23/2312; B01F23/23123; B01F23/232; B01F23/2321; B01F23/2322; B01F23/233; B01F23/2331; B01F23/23312; B01F23/2336; B01F23/23363; B01F25/00; B01F25/30; B01F25/31; B01F25/313; B01F25/3132; B01F2025/91; B01F2025/918; B01F25/50; Y; Y10; Y10S; Y10S159/00; Y10S159/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |