Patent US3347170A successfully refreshed from Google Patents.
Patent US3278655A successfully refreshed from Google Patents.
US3278655A
Expired / Lapsed
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Method for sphering refractory oxides
Assignee: Lockheed Martin Corp
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Filing: 1961-10-13
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Granted: 1966-10-11
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Expires: 1981-10-13
Abstract
No abstract record available.
Inventors
- 👤 Harold N Barr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:08
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/02; B01J2/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE METHOD OF FORMING SPHERES OF A REFRACTORY OXIDE COMPRISING THE FOLLOWING STEPS: (A) MIXNG SAID OXIDE WITH AN ESSENTIALLY SMALL PORTION OF AN ADDITIVE EFFECTIVE TO FORM A PHASE WITH SAID OXIDE WHEN HEATED IN PASSING THROUGH AN OXY-HYDROCARBON FLAME HAVING A LOWER MELTING POINT THAN SAID OXIDE, (B) FORMING SAID OXIDE AND ADDITIVE MIXTURE INTO GRANULES OF A CERTAIN SIZE, (C) PASSING SAID GRANULES THROUGH AN OXY-HYDROCARBON FLAME HAVING SUFFICIENT HEAT INTENSITY TO MELT SAID PHASE, (D) AND DIRECTING SAID GRANULES TO A COOLING ENVIRONMENT.
Claim 2
Independent Claim
87 words
THE METHOD OF FORMING SPHERES OF A REFRACTORY OXIDE COMPRISING THE FOLLOWING STEPS: (A) MIXNG SAID OXIDE WITH AN ESSENTIALLY SMALL PORTION OF AN ADDITIVE EFFECTIVE TO FORM A PHASE WITH SAID OXIDE WHEN HEATED IN PASSING THROUGH AN OXY-HYDROCARBON FLAME HAVING A LOWER MELTING POINT THAN SAID OXIDE, (B) FORMING SAID OXIDE AND ADDITIVE MIXTURE INTO GRANULES OF A CERTAIN SIZE, (C) PASSING SAID GRANULES THROUGH AN OXY-HYDROCARBON FLAME HAVING SUFFICIENT HEAT INTENSITY TO MELT SAID PHASE, (D) AND DIRECTING SAID GRANULES TO A COOLING ENVIRONMENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |