US2853241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for production of finely divided materials
Assignee: International Minerals and Chemical Corp
•
Filing: 1954-02-15
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Granted: 1958-09-23
•
Expires: 1974-02-15
Abstract
No abstract record available.
Inventors
- 👤 Gindoff Sol
- 👤 Louis S Mccollum
- 👤 Jr Albert Polanco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:05
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B02; B02C; B02C19/00; C; C04; C04B; C04B20/00; C04B20/02; C04B20/04; C04B20/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
IN APPARATUS FOR PRODUCING FROM GROUND PERLITE PARTICULATE MATERIAL SUITABLE FOR USE AS A FILTER AID, THE COMBINATION OF A VERTICALLY ELONGATED FURNACE FOR EXPANDING PERLITE PARTICLES, MEANS FOR FEEDING GROUND PERLITE THROUGH A SIDE OPENING INTO SAID FURNACE, MEANS FOR FEEDING A COMBUSTION GAS AT A HIGH VELOCITY INTO THE LOWER END OF SAID FURNACE, THE UPPER END OF SAID FURNACE HAVING A CONSTRICTED OUTLET OPENING WHEREBY THE VELOCITY OF UPWARDLY-RISING EXPANDED PERLITE PARTICLES AND GASEOUS PRODUCTS OF COMBUSTION IS GREATLY INCREASED, WALLS FORMING A CHAMBER ABOVE AND SURROUNDING SAID CONSTRICTED OUTLET, AND A COMMINUTING SURFACE IN SAID CHAMBER POSI-
Claim 2
Dependent Claim
101 words
IN APPARATUS FOR PRODUCING FROM GROUND PERLITE PARTICULATE MATERIAL SUITABLE FOR USE AS A FILTER AID, THE COMBINATION OF A VERTICALLY ELONGATED FURNACE FOR EXPANDING PERLITE PARTICLES, MEANS FOR FEEDING GROUND PERLITE THROUGH A SIDE OPENING INTO SAID FURNACE, MEANS FOR FEEDING A COMBUSTION GAS AT A HIGH VELOCITY INTO THE LOWER END OF SAID FURNACE, THE UPPER END OF SAID FURNACE HAVING A CONSTRICTED OUTLET OPENING WHEREBY THE VELOCITY OF UPWARDLY-RISING EXPANDED PERLITE PARTICLES AND GASEOUS PRODUCTS OF COMBUSTION IS GREATLY INCREASED, WALLS FORMING A CHAMBER ABOVE AND SURROUNDING SAID CONSTRICTED OUTLET, AND A COMMINUTING SURFACE IN SAID CHAMBER POSI-
References Cited (Backward Citations)
US90097A
Cited
US864209A
Cited
US1571518A
Cited
US2055385A
Cited
US2431884A
Cited
US2665813A
Cited
US2651470A
Cited
US2666632A
Cited
US2798674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |