US2531975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for expanding minerals
Assignee: Individual
•
Filing: 1947-04-19
•
Granted: 1950-11-28
•
Expires: 1967-04-19
Abstract
No abstract record available.
Inventors
- 👤 Jesse L Essex
- 👤 John R Appleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:18
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/02; C04B20/04; C04B20/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
APPARATUS FOR CELLULATING EXPANDABLE ROCKS AND ORES COMPRISING IN COMBINATION A HEARTH, MEANS FOR MOVING A STREAM OF SAID GRANULES OVER SAID HEARTH, SAID HEARTH INCREASING IN AREA TOWARDS ITS DISCHARGE END TO ACCOMMODATE THE INCREASED AREA REQUIRED FOR THE EXPANDED GRANULES, A SOURCE OF RADIANT ENERGY ABOVE SAID HEARTH SPACED FROM BUT IN CLOSE PROXIMITY TO THE STREAM OF GRANULES AND CONSTITUTING SUBSTANTIALLY THE SOLE SOURCE OF HEAT ENERGY FOR EXPANDING SAID GRANULES, THE TEMPERATURE OF SAID SOURCE BEING AT LEAST AS HIGH AS THE EXPANDING TEMPERATURE OF THE MATERIAL, AND MEANS FOR COLLECTING THE EXPANDED MATERIAL AFTER IT PASSES OUT OF THE FIELD OF RADIANT ENERGY.
Claim 2
Dependent Claim
108 words
APPARATUS FOR CELLULATING EXPANDABLE ROCKS AND ORES COMPRISING IN COMBINATION A HEARTH, MEANS FOR MOVING A STREAM OF SAID GRANULES OVER SAID HEARTH, SAID HEARTH INCREASING IN AREA TOWARDS ITS DISCHARGE END TO ACCOMMODATE THE INCREASED AREA REQUIRED FOR THE EXPANDED GRANULES, A SOURCE OF RADIANT ENERGY ABOVE SAID HEARTH SPACED FROM BUT IN CLOSE PROXIMITY TO THE STREAM OF GRANULES AND CONSTITUTING SUBSTANTIALLY THE SOLE SOURCE OF HEAT ENERGY FOR EXPANDING SAID GRANULES, THE TEMPERATURE OF SAID SOURCE BEING AT LEAST AS HIGH AS THE EXPANDING TEMPERATURE OF THE MATERIAL, AND MEANS FOR COLLECTING THE EXPANDED MATERIAL AFTER IT PASSES OUT OF THE FIELD OF RADIANT ENERGY.
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) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |