Patent US1061674A successfully refreshed from Google Patents.
US2311625A
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Gas purification
Assignee: Standard Oil Co
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Filing: 1939-12-21
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Granted: 1943-02-23
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Expires: 1959-12-21
Abstract
No abstract record available.
Inventors
- 👤 David W Bransky
- 👤 Fred F Diwoky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:32
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/507; B01D53/14; B01D53/1493; C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/76; C01B17/88; C07; C07H; C07H7/00; C07H7/02; C07H7/033; B01D2251/00; B01D2251/70; B01D2257/00; B01D2257/30; B01D53/18
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) | 1946-02-22 | 1946-08-24 | 1947-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-02-22 | 1950-08-24 | 1951-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-02-22 | 1954-08-24 | 1955-02-23 | $7700.00 | Window Closed / Lapsed |