Patent US2944807A successfully refreshed from Google Patents.
US2944807A
Expired / Lapsed
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⏱️ 0.0 years remaining
Process for supplying heat to a bed of finely divided refractory material
Assignee: Shell USA Inc
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Filing: 1957-11-18
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Granted: 1960-07-12
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Expires: 1977-11-18
Abstract
No abstract record available.
Inventors
- 👤 Geert G Kruijer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:05
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/10; F28C3/12; F28C3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN A PROCESS FOR PREVENTING THE SINTERING OF A BED OF SAND PARTICLES DIRECTLY HEATED BY THE COMBUSTION WITH AIR OF A LIQUID HYDROCARBON FUEL CONTAINING AMOUNTS OF A METAL OF THE GROUP CONSISTING OF VANDIUM AND SODIUM SUFFICIENT TO CAUSE SINTERING OF SAID BED, THE STEPS OF ADDING TO A BED OF SAND PARTICLES AMOUNTS OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM OXIDE, ALUMINUM OXIDE, ZINC OXIDE AND CALCIUM OXIDE TO A BED OF SAND SUFFICIENT TO PREVENT THE SINTERING OF SAID BED AND PASSING HOT GASES RESULTING FROM THE COMBUSTION OF THE LIQUID HYDROCARBON FUEL WITH THE AIR THROUGH THE RESULTING MIXED BED.
Claim 2
Dependent Claim
108 words
IN A PROCESS FOR PREVENTING THE SINTERING OF A BED OF SAND PARTICLES DIRECTLY HEATED BY THE COMBUSTION WITH AIR OF A LIQUID HYDROCARBON FUEL CONTAINING AMOUNTS OF A METAL OF THE GROUP CONSISTING OF VANDIUM AND SODIUM SUFFICIENT TO CAUSE SINTERING OF SAID BED, THE STEPS OF ADDING TO A BED OF SAND PARTICLES AMOUNTS OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM OXIDE, ALUMINUM OXIDE, ZINC OXIDE AND CALCIUM OXIDE TO A BED OF SAND SUFFICIENT TO PREVENT THE SINTERING OF SAID BED AND PASSING HOT GASES RESULTING FROM THE COMBUSTION OF THE LIQUID HYDROCARBON FUEL WITH THE AIR THROUGH THE RESULTING MIXED BED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |