Patent US4443697A successfully refreshed from Google Patents.
Patent US3059455A successfully refreshed from Google Patents.
US3059455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making light weight aggregate
Assignee: Dow Chemical Co
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Filing: 1959-08-20
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Granted: 1962-10-23
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Expires: 1979-08-20
Abstract
No abstract record available.
Inventors
- 👤 Howard L Mcnally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:01
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A CONTINUOUS PROCESS FOR CONVERTING THE MOLTEN ASH FROM WET BOTTOM BOILERS TO LIGHT WEIGHT AGGREGATE WHICH IS SUITABLE FFOR USE IN CONCRETE COMPRISING DIRECTING DOWNWARDLY ONTO A SPINNING DISPERSING ELEMENT HAVING A PERIPHERAL PART WHICH IS ROTATING AT A PERIPHERAL SPEED OF BETWEEN 3,500 AND 4,500 FEET PER MINUTE A STREAM OF MOLTEN ASH HAVING A VISCOSITY OF LESS THAN 250 POISES AND, AT THE SAME TIME, INTIMATELY MIXING PARTICULATED COAL INTO SAID MOLTEN ASH, DISPERSING SAID MOLTEN ASH AND COAL IN SHEET-LIKE FORM ONTO A COOLED DRY SURFACE AND COOLING IN A CONTROLLED MANNER THE MIXTURE OF MOLTEN ASH AND COAL UNTIL IT IS
Claim 2
Dependent Claim
106 words
A CONTINUOUS PROCESS FOR CONVERTING THE MOLTEN ASH FROM WET BOTTOM BOILERS TO LIGHT WEIGHT AGGREGATE WHICH IS SUITABLE FFOR USE IN CONCRETE COMPRISING DIRECTING DOWNWARDLY ONTO A SPINNING DISPERSING ELEMENT HAVING A PERIPHERAL PART WHICH IS ROTATING AT A PERIPHERAL SPEED OF BETWEEN 3,500 AND 4,500 FEET PER MINUTE A STREAM OF MOLTEN ASH HAVING A VISCOSITY OF LESS THAN 250 POISES AND, AT THE SAME TIME, INTIMATELY MIXING PARTICULATED COAL INTO SAID MOLTEN ASH, DISPERSING SAID MOLTEN ASH AND COAL IN SHEET-LIKE FORM ONTO A COOLED DRY SURFACE AND COOLING IN A CONTROLLED MANNER THE MIXTURE OF MOLTEN ASH AND COAL UNTIL IT IS
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) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |