US3458973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for component concentration in the vapor phase
Assignee: ConocoPhillips Co
•
Filing: 1966-12-09
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Granted: 1969-08-05
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Expires: 1986-12-09
Abstract
No abstract record available.
Inventors
- 👤 John R Spencer
- 👤 Walton D Greathouse
- 👤 James H Cheek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:24
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D2256/00; B01D2256/24; B01D2257/00; B01D2257/70; B01D2257/702; B01D2257/7022; B01D2259/00; B01D2259/40; B01D2259/40003; B01D2259/40083; B01D2259/40088; B01D2259/4009; B01D2259/403; B01D53/0407; B01D53/0446
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3186144A
Cited
US3080692A
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US3311189A
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US3055157A
Cited
US3266221A
Cited
US3324669A
Cited
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 |