Patent US2995208A successfully refreshed from Google Patents.
US2995208A
Expired / Lapsed
US
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Adsorption process and apparatus
Assignee: Phillips Petroleum Co
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Filing: 1958-08-15
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Granted: 1961-08-08
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Expires: 1978-08-15
Abstract
No abstract record available.
Inventors
- 👤 Karl H Hachmuth
- 👤 Lyman W Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:31
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/06; B01D53/04; B01D53/0407; B01D53/0423; B01D2259/00; B01D2259/40; B01D2259/406; B01D2259/4061
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) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |