US2500801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of catalytic bodies
Assignee: Phillips Petroleum Co
•
Filing: 1946-11-07
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Granted: 1950-03-14
•
Expires: 1966-11-07
Abstract
No abstract record available.
Inventors
- 👤 Church J Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:52
CPC Classifications
C; C03; C03C; C03C15/00; B; B01; B01J; B01J21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PROCESS FOR THE PREPARATION OF POROUS SILICEOUS PEBBLES WHICH COMPRISES DISPERSING MOLTEN GLASS INTO A COOLING COLUMN TO FORM SPHERICAL DROPS OF MOLTEN GLASS; GRADUALLY COOLING AND SOLIDIFYING SAID DIPERSED GLASS SPHERES AS THEY GRADUALLY DESCEND THROUGH A RISING STREAM OF HOT GAS IN SAID COLUMN MAINTAINED AT A TEMPERATURE
Claim 2
Dependent Claim
51 words
A PROCESS FOR THE PREPARATION OF POROUS SILICEOUS PEBBLES WHICH COMPRISES DISPERSING MOLTEN GLASS INTO A COOLING COLUMN TO FORM SPHERICAL DROPS OF MOLTEN GLASS; GRADUALLY COOLING AND SOLIDIFYING SAID DIPERSED GLASS SPHERES AS THEY GRADUALLY DESCEND THROUGH A RISING STREAM OF HOT GAS IN SAID COLUMN MAINTAINED AT A TEMPERATURE
References Cited (Backward Citations)
US496044A
Cited
US996132A
Cited
US1128175A
Cited
GB112792A
Cited
US1837869A
Cited
US2038251A
Cited
US2215039A
Cited
US2315329A
Cited
US2334578A
Cited
US2387454A
Cited
US2384946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |