Patent US2684729A successfully refreshed from Google Patents.
US2684729A
Expired / Lapsed
US
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Adsorption process and apparatus
Assignee: Union Oil Company of California
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Filing: 1952-12-06
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Granted: 1954-07-27
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Expires: 1972-12-06
Abstract
No abstract record available.
Inventors
- 👤 Clyde H O Berg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:19
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/06; B01D53/08; B01D2253/00; B01D2253/10; B01D2253/102; B01D2253/106; B01D2253/112; B01D2253/1124; B01D2253/30; B01D2253/302; B01D2253/304; B01D2256/00; B01D2256/24; B01D2257/00; B01D2257/70; B01D2257/702; B01D2259/00; B01D2259/40; B01D2259/40011; B01D2259/40077; B01D2259/40081; B01D2259/40083; B01D2259/40086; B01D2259/40088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US914105A
Cited
US1825707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |