Patent US2839337A successfully refreshed from Google Patents.
US2839337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pebble heat exchanger
Assignee: Phillips Petroleum Co
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Filing: 1953-12-21
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Granted: 1958-06-17
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Expires: 1973-12-21
Abstract
No abstract record available.
Inventors
- 👤 Lloyd E Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:42
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/10; F28C3/12; F28C3/14; B; B01; B01J; B01J8/00; B01J8/0015; B01J8/0025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
AN IMPROVED PEBBLE FEEDER COMPRISING IN COMBINATION, A CLOSED, UPRIGHT ELONGATED SHELL, PEBBLE INLET MEANS IN THE UPPER END PORTION OF SAID SHELL, PEBBLE ENTRAINMENT MEANS EXTENDING THROUGH SAID SHELL AND COMPRISING ELEVATOR CONDUIT SECTION OPEN IN ITS LOWER END, A LIFT GAS INLET CONDUIT SECTION COAXIALLY DISPOSED WITH RESPECT TO SAID ELEVATOR CONDUIT SECTION AND OPEN ON ITS UPPER END, SAID LIFT GAS INLET BEING THE SOLE MEANS FOR INTRODUCING LIFT GAS INTO SAID ELEVATOR CONDUIT, PASSAGE MEANS FROM THE INTERIOR OF SAID SHELL INTO AN IN-LINE PASSAGE FORMED BY SAID ELEVATOR CONDUIT SECTION AND SAID LIFT GAS INLET CONDUIT SECTION ON A HORIZONTAL PLANE INTERMEDIATE THE ENDS OF SAID SHELL, EACH OF SAID PASSAGE
Claim 2
Dependent Claim
116 words
AN IMPROVED PEBBLE FEEDER COMPRISING IN COMBINATION, A CLOSED, UPRIGHT ELONGATED SHELL, PEBBLE INLET MEANS IN THE UPPER END PORTION OF SAID SHELL, PEBBLE ENTRAINMENT MEANS EXTENDING THROUGH SAID SHELL AND COMPRISING ELEVATOR CONDUIT SECTION OPEN IN ITS LOWER END, A LIFT GAS INLET CONDUIT SECTION COAXIALLY DISPOSED WITH RESPECT TO SAID ELEVATOR CONDUIT SECTION AND OPEN ON ITS UPPER END, SAID LIFT GAS INLET BEING THE SOLE MEANS FOR INTRODUCING LIFT GAS INTO SAID ELEVATOR CONDUIT, PASSAGE MEANS FROM THE INTERIOR OF SAID SHELL INTO AN IN-LINE PASSAGE FORMED BY SAID ELEVATOR CONDUIT SECTION AND SAID LIFT GAS INLET CONDUIT SECTION ON A HORIZONTAL PLANE INTERMEDIATE THE ENDS OF SAID SHELL, EACH OF SAID PASSAGE
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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) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |