Patent US6085165A successfully refreshed from Google Patents.
Patent US2686161A successfully refreshed from Google Patents.
US2686161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Siliceous contact material and method of manufacture
Assignee: Johns Manville Corp
•
Filing: 1950-06-28
•
Granted: 1954-08-10
•
Expires: 1970-06-28
Abstract
No abstract record available.
Inventors
- 👤 Meredith M Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:28
CPC Classifications
B; B01; B01J; B01J21/00; Y; Y10; Y10S; Y10S425/00; Y10S425/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
THE METHOD OF PRODUCING SPHERULAR SILICEOUS CATALYST CARRIER AGGREGATE GRANULES SUITABLE FOR FLUIDIZATION AND HAVING A DENSITY IN THE RANGE 25-40 LBS./CU. FT. AND HIGH ATTRITION RESISTANCE WHICH COMPRISES, THOROUGHLY MOISTENING FINELY DIVIDED DIATOMACEOUS SILICA AND A BONDING CLAY WITH WATER SUBJECTING THE MOIST MATERIAL TO PROLONGED PUGGING WITH GRADUAL ADDITION OF MORE DIATOMACEOUS SILICA, THEREBY DEVELOPING A GRANULAR AGGLOMERATE, SUBJECTING THE THUS FORMED MOIST AGGLOMERATE GRANULES WHILE IN GAS SUSPENSION TO A DRYING TREATMENT ACCOMPANIED BY AGITATION AND ROLLING OF THE GRANULES TO DEVELOP A SPHERULAR SHAPE, SEPARATING FROM THE RESULTING DRY PRODUCT EXCESSIVELY FINE AND COARSE MATERIAL, AND CALCINING THE RESULTING SPHERURAL GRANULES WITH ROLLING AGITATION AT A TEMPERATURE IN THE RANGE 1800-200* F.
Claim 2
Independent Claim
116 words
THE METHOD OF PRODUCING SPHERULAR SILICEOUS CATALYST CARRIER AGGREGATE GRANULES SUITABLE FOR FLUIDIZATION AND HAVING A DENSITY IN THE RANGE 25-40 LBS./CU. FT. AND HIGH ATTRITION RESISTANCE WHICH COMPRISES, THOROUGHLY MOISTENING FINELY DIVIDED DIATOMACEOUS SILICA AND A BONDING CLAY WITH WATER SUBJECTING THE MOIST MATERIAL TO PROLONGED PUGGING WITH GRADUAL ADDITION OF MORE DIATOMACEOUS SILICA, THEREBY DEVELOPING A GRANULAR AGGLOMERATE, SUBJECTING THE THUS FORMED MOIST AGGLOMERATE GRANULES WHILE IN GAS SUSPENSION TO A DRYING TREATMENT ACCOMPANIED BY AGITATION AND ROLLING OF THE GRANULES TO DEVELOP A SPHERULAR SHAPE, SEPARATING FROM THE RESULTING DRY PRODUCT EXCESSIVELY FINE AND COARSE MATERIAL, AND CALCINING THE RESULTING SPHERURAL GRANULES WITH ROLLING AGITATION AT A TEMPERATURE IN THE RANGE 1800-200* F.
References Cited (Backward Citations)
US1435972A
Cited
US1792058A
Cited
US2038653A
Cited
US2107215A
Cited
US2112380A
Cited
US2035845A
Cited
US2423686A
Cited
US2478757A
Cited
US2454942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |