US2858902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent recovery process
Assignee: Phillips Petroleum Co
•
Filing: 1956-08-03
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Granted: 1958-11-04
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Expires: 1976-08-03
Abstract
No abstract record available.
Inventors
- 👤 John E Cottle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:06
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
37 words
A METHOD FOR ABSORGING CYCLOHEXANE IN THE GASEOUS STATE WHICH COMPRISES CONTACTING THE CYCLOHEXANE WITH A SOLID ETHYLENE POLYMER HAVING A DENSITY OF AT LEAST 0.94 AND A CRYSTALLINITY OF AT LEAST 70 PERCENT AT AMBIENT TEMPERATURES.
References Cited (Backward Citations)
US2726231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |