US2769693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pebble heat exchanger
Assignee: Phillips Petroleum Co
•
Filing: 1951-12-21
•
Granted: 1956-11-06
•
Expires: 1971-12-21
Abstract
No abstract record available.
Inventors
- 👤 Louis C Bearer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:55
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/10; F28C3/12; F28C3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IMPROVED PEBBLE HEATER APPARATUS COMPRISING IN COMBINATION A CLOSED, UPRIGHT, ELONGATED SHELL; AN UPRIGHT PARTITION WITHIN AND EXTENDING FROM THE BOTTOM TO THE TOP OF SAID SHELL SO AS TO DIVIDE THE SPACE WITHIN SAID SHELL INTO A FIRST CHAMBER ON ONE SIDE OF SAID PARTITION AND A SECOND CHAMBER ON THE OTHER SIDE; GASEOUS MATERIAL CONDUITS INTERMEDIATE THE ENDS OF SAID PARTITION AND EXTENDING BETWEN THE TWO CHAMBERS; SEPARATE PEBBLE INLET CONDUIT MEANS IN THE UPPER END OF EACH CHAMBER, THE DELIVERY END OF THE CONDUIT IN SAID SECOND CHAMBER BEING AT A LOWER LEVER THAN THE DELIVERY END OF THE CONDUIT IN SAID FIRST CHAMBER; PEBBLE OUTLET MEANS IN THE BOTTOM OF
Claim 2
Dependent Claim
114 words
IMPROVED PEBBLE HEATER APPARATUS COMPRISING IN COMBINATION A CLOSED, UPRIGHT, ELONGATED SHELL; AN UPRIGHT PARTITION WITHIN AND EXTENDING FROM THE BOTTOM TO THE TOP OF SAID SHELL SO AS TO DIVIDE THE SPACE WITHIN SAID SHELL INTO A FIRST CHAMBER ON ONE SIDE OF SAID PARTITION AND A SECOND CHAMBER ON THE OTHER SIDE; GASEOUS MATERIAL CONDUITS INTERMEDIATE THE ENDS OF SAID PARTITION AND EXTENDING BETWEN THE TWO CHAMBERS; SEPARATE PEBBLE INLET CONDUIT MEANS IN THE UPPER END OF EACH CHAMBER, THE DELIVERY END OF THE CONDUIT IN SAID SECOND CHAMBER BEING AT A LOWER LEVER THAN THE DELIVERY END OF THE CONDUIT IN SAID FIRST CHAMBER; PEBBLE OUTLET MEANS IN THE BOTTOM OF
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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) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |