US2669531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of spent polymerization catalyst
Assignee: Universal Oil Products Co
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Filing: 1947-12-22
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Granted: 1954-02-16
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Expires: 1967-12-22
Abstract
No abstract record available.
Inventors
- 👤 Alexander G Petkus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:38
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/28; B01J27/285
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A METHOD FOR REMOVING A PACKED BED OF SPENT POLYMERIZATION CATALYST FROM A CONFINED ZONE, WHICH COMPRISES, PASSING STEAM THROUGH SAID BED FOR A SUFFICIENT TIME TO DISTILL HYDROCARBONACEOUS MATERIALS THEREFROM AND EFFECT A PARTIAL SOFTENING OF SAID CATALYST, SUBSEQUENTLY OPENING SAID CONFINED ZONE TO THE ATMOSPHERE BELOW SAID BED, AND APPLYING A SUFFICIENTLY HIGH HYDRAULIC PRESSURE IN A DOWNWARD DIRECTION TO THE ENTIRE TOP SURFACE OF SAID BED TO FORCE SAID CATALYST FROM THE LOWER END OF SAID CONFINED ZONE.
Claim 2
Independent Claim
81 words
A METHOD FOR REMOVING A PACKED BED OF SPENT POLYMERIZATION CATALYST FROM A CONFINED ZONE, WHICH COMPRISES, PASSING STEAM THROUGH SAID BED FOR A SUFFICIENT TIME TO DISTILL HYDROCARBONACEOUS MATERIALS THEREFROM AND EFFECT A PARTIAL SOFTENING OF SAID CATALYST, SUBSEQUENTLY OPENING SAID CONFINED ZONE TO THE ATMOSPHERE BELOW SAID BED, AND APPLYING A SUFFICIENTLY HIGH HYDRAULIC PRESSURE IN A DOWNWARD DIRECTION TO THE ENTIRE TOP SURFACE OF SAID BED TO FORCE SAID CATALYST FROM THE LOWER END OF SAID CONFINED ZONE.
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) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |