US3459824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of contaminants from unsaturated hydrocarbon-containing mixtures
Assignee: Phillips Petroleum Co
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Filing: 1968-03-04
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Granted: 1969-08-05
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Expires: 1988-03-04
Abstract
No abstract record available.
Inventors
- 👤 William T Nelson
- 👤 Marvin M Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:49
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/12; C07C11/16; C07C11/167; B; B01; B01J; B01J27/00; B01J27/14; B01J27/16; B01J27/18; B01J27/1802; B01J27/1817; C07C7/00; C07C7/148; C07C7/14858; C07C7/14866
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) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |