US3255159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dirt trap for downflow reactors
Assignee: Universal Oil Products Co
•
Filing: 1964-09-22
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Granted: 1966-06-07
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Expires: 1984-09-22
Abstract
No abstract record available.
Inventors
- 👤 Walter N Frandsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:40
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; B; B01; B01D; B01D46/00; B01D46/30; B01J; B01J8/00; B01J8/005; B01J8/006; C10G49/00; C10G49/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN A CONTACTING CHAMBER HAVING A FLUID INLET IN THE TOP THEREOF, A DIRT TRAP THEREFOR WHICH COMPRISES A VERTICAL CASING HAVING AN OPEN UPPER END SPACED BELOW AND AXIALLY ALIGNED WITH SAID FLUID INLET, AN IMPERFORATE CLOSURE MEMBER ACROSS THE LOWER PORTION OF SAID CASING, A GRATING MEANS EXTENDING ACROSS THE UPPER PORTION OF THE CASING, AND PERIPHERAL RELIEF VENT MEANS COMPRISING A PLURALITY OF PERIPHERALLY SPACED PERFORATIONS IN SAID CASING ARRANGED IN A NARROW BAND IMMEDIATELY BELOW SAID GRATING, THE REMAINING PORTION OF SAID CASING BELOW SAID RELIEF VENT BEING IMPERFORATE.
Claim 2
Dependent Claim
93 words
IN A CONTACTING CHAMBER HAVING A FLUID INLET IN THE TOP THEREOF, A DIRT TRAP THEREFOR WHICH COMPRISES A VERTICAL CASING HAVING AN OPEN UPPER END SPACED BELOW AND AXIALLY ALIGNED WITH SAID FLUID INLET, AN IMPERFORATE CLOSURE MEMBER ACROSS THE LOWER PORTION OF SAID CASING, A GRATING MEANS EXTENDING ACROSS THE UPPER PORTION OF THE CASING, AND PERIPHERAL RELIEF VENT MEANS COMPRISING A PLURALITY OF PERIPHERALLY SPACED PERFORATIONS IN SAID CASING ARRANGED IN A NARROW BAND IMMEDIATELY BELOW SAID GRATING, THE REMAINING PORTION OF SAID CASING BELOW SAID RELIEF VENT BEING IMPERFORATE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |