US3332740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesium oxide casting
Assignee: —
•
Filing: —
•
Granted: 1967-07-25
•
Expires: 1984-07-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:03
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/62605; C04B35/62645; C04B35/62665; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3201; C04B2235/3205; C04B2235/3206; C04B2235/3208; C04B2235/3217; C04B2235/3222; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5427; C04B2235/70; C04B2235/74; C04B2235/77; C04B2235/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A FUSED, MONOLITHIC CASTING OF ESSENTIALLY PURE MAGNESIUM OXIDE REFRACTORY HAVING A CRYSTALLINE TEXTURE CONSISTING OF NOT MORE THAN ABOUT 50 VOLUME PERCENT ELONGATED, ORIENTED, PERICLASE CRYSTALS WITH THE REMAINDER BEING ESSENTIALLY EQUANT, UNORIENTED, PERICLASE CRYSTALS, AND A SUBSTANTIAL MAJORITY OF SAID EQUANT CRYSTALS HAVING A FINETO-MEDIUM GRAIN SIZE NOT GREATER THAN 5000 MICRONS.
Claim 2
Dependent Claim
54 words
A FUSED, MONOLITHIC CASTING OF ESSENTIALLY PURE MAGNESIUM OXIDE REFRACTORY HAVING A CRYSTALLINE TEXTURE CONSISTING OF NOT MORE THAN ABOUT 50 VOLUME PERCENT ELONGATED, ORIENTED, PERICLASE CRYSTALS WITH THE REMAINDER BEING ESSENTIALLY EQUANT, UNORIENTED, PERICLASE CRYSTALS, AND A SUBSTANTIAL MAJORITY OF SAID EQUANT CRYSTALS HAVING A FINETO-MEDIUM GRAIN SIZE NOT GREATER THAN 5000 MICRONS.
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) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |