US2729548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pebble heat exchange chamber
Assignee: Phillips Petroleum Co
•
Filing: 1952-09-08
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Granted: 1956-01-03
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Expires: 1972-09-08
Abstract
No abstract record available.
Inventors
- 👤 Curt E Forkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:59
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/08; B01J8/087; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00026; B01J2208/00035; B01J2208/00088; B01J2208/00327; B01J2208/00336; B01J2208/0038; B01J2208/00477; B01J2208/00495
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
AN IMPROVED PEBBLE HEAT EXCHANGE CHAMBER COMPRISING IN COMBINATION A CLOSED, UPRIGHT, ELONGATED SHELL; PEBBLE INLET MEANS IN THE UPPER END OF SAID SHELL; PEBBLE OUTLET MEANS IN THE LOWER END OF SAID SHELL; GASEOUS MATERIAL INLET MEANS IN THE LOWER END OF SAID SHELL; AND A HOLLOW CORE CENTRALLY POSITIONED WITHIN SAID SHELL, EXTENDING DOWNWARDLY THROUGH SAID CHAMBER OF A POINT IN THE UPPER END PORTION, AND ABOVE THE NOR-
Claim 2
Dependent Claim
71 words
AN IMPROVED PEBBLE HEAT EXCHANGE CHAMBER COMPRISING IN COMBINATION A CLOSED, UPRIGHT, ELONGATED SHELL; PEBBLE INLET MEANS IN THE UPPER END OF SAID SHELL; PEBBLE OUTLET MEANS IN THE LOWER END OF SAID SHELL; GASEOUS MATERIAL INLET MEANS IN THE LOWER END OF SAID SHELL; AND A HOLLOW CORE CENTRALLY POSITIONED WITHIN SAID SHELL, EXTENDING DOWNWARDLY THROUGH SAID CHAMBER OF A POINT IN THE UPPER END PORTION, AND ABOVE THE NOR-
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) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |