Patent US2501699A successfully refreshed from Google Patents.
US2501699A
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Thermal vesiculation and treating process for volcanic glasses
Assignee: GREAT LAKES CARBON Corp
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Filing: 1947-06-05
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Granted: 1950-03-28
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Expires: 1967-06-05
Abstract
No abstract record available.
Inventors
- 👤 Stecker Glenroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:37
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/02; C04B20/04; C04B20/06; Y; Y10; Y10S; Y10S106/00; Y10S106/01; Y10S106/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A PROCESS FOR EXPANDING AND VESICULATING A PERLITIC MINERAL WHICH COMPRISES RAPIDLY HEATING THE COMMINUTED MINERAL AT A TEMPERATURE OF ABOUT 1050-1300*C. FOR A TIME OF LESS THAN ABOUT 1 MINUTE TO PRODUCE A MAXIMUM VESICULATION AND THEREAFTER IMMEDIATELY COOLING SAID MINERAL BY ABOUT 50* TO ABOUT 200*C. TO A POINT AT WHICH NO FURTHER INCREASE IN BULK VOLUME OCCURS, HEATING THE MINERAL AT THIS POINT FOR FROM 2 TO 5 MINUTES AND THEREAFTER INCREASING THE TEMPERATURE TO A POINT IN THE RANGE OF ABOUT 1000-1300*C., BUT NOT SUBSTANTIALLY HIGHER THAN THAT OF THE ORIGINAL TEMPERATURE OF VESICULATION AND MAINTAINING IT AT THIS POINT UNTIL THE SEALED VOID VOLUME BECOMES SUBSTANTIALLY CONSTANT.
Claim 2
Dependent Claim
112 words
A PROCESS FOR EXPANDING AND VESICULATING A PERLITIC MINERAL WHICH COMPRISES RAPIDLY HEATING THE COMMINUTED MINERAL AT A TEMPERATURE OF ABOUT 1050-1300*C. FOR A TIME OF LESS THAN ABOUT 1 MINUTE TO PRODUCE A MAXIMUM VESICULATION AND THEREAFTER IMMEDIATELY COOLING SAID MINERAL BY ABOUT 50* TO ABOUT 200*C. TO A POINT AT WHICH NO FURTHER INCREASE IN BULK VOLUME OCCURS, HEATING THE MINERAL AT THIS POINT FOR FROM 2 TO 5 MINUTES AND THEREAFTER INCREASING THE TEMPERATURE TO A POINT IN THE RANGE OF ABOUT 1000-1300*C., BUT NOT SUBSTANTIALLY HIGHER THAN THAT OF THE ORIGINAL TEMPERATURE OF VESICULATION AND MAINTAINING IT AT THIS POINT UNTIL THE SEALED VOID VOLUME BECOMES SUBSTANTIALLY CONSTANT.
References Cited (Backward Citations)
US2424330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |