US2750158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pebble heat exchange chamber
Assignee: Phillips Petroleum Co
•
Filing: 1952-07-28
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Granted: 1956-06-12
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Expires: 1972-07-28
Abstract
No abstract record available.
Inventors
- 👤 Curt E Forkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:00
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/10; F28C3/12; F28C3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
AN IMPROVED PEBBLE HEAT EXCHANGER CHAMBER COMPRISING IN COMBINATION A CLOSED UPRIGHT, ELONGATED SHELL; PEBBLE INLET CONDUIT MEANS EXTENDING INTO THE UPPER END PORTION OF SAID SHELL ADJACENT ITS PERIPHERY; PEBBLE OUTLET MEANS IN THE LOWER END OF SAID SHELL; GASEOUS EFFLUENT OUTLET CONDUIT MEANS EXTENDING FROM THE UPPER END OF SAID
Claim 2
Dependent Claim
52 words
AN IMPROVED PEBBLE HEAT EXCHANGER CHAMBER COMPRISING IN COMBINATION A CLOSED UPRIGHT, ELONGATED SHELL; PEBBLE INLET CONDUIT MEANS EXTENDING INTO THE UPPER END PORTION OF SAID SHELL ADJACENT ITS PERIPHERY; PEBBLE OUTLET MEANS IN THE LOWER END OF SAID SHELL; GASEOUS EFFLUENT OUTLET CONDUIT MEANS EXTENDING FROM THE UPPER END OF SAID
References Cited (Backward Citations)
US2554435A
Cited
US2576058A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |