US3044889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tar-bonded magnesia brick and method
Assignee: —
•
Filing: —
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Granted: 1962-07-17
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Expires: 1979-07-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:25
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/013; C04B35/04; C04B35/043; C04B35/622; C04B35/626; C04B35/62605; C04B35/62645; C04B35/62665; C04B35/66; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3208; C04B2235/3217; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5427; C04B2235/70; C04B2235/72; C04B2235/74; C04B2235/77
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
43 words
A REFRACTORY BRICK CONSISTING ESSENTIALLY OF GRANULATED MAGNESIA-BEARING MINERALS OF THE GROUP CONSISTING OF DOLOMITE, MAGNESITE AND PERICLASE, BONDED BY 4-6% OF THE GROUP CONSISTING OF TAR AND PITCH AND .5% TO 5% P2O5, BOTH PERCENTAGES BEING OF THE WEIGHT OF THE MINERALS.
References Cited (Backward Citations)
US2845359A
Cited
US2943240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-16 | 1966-01-15 | 1966-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-16 | 1970-01-15 | 1970-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-16 | 1974-01-15 | 1974-07-17 | $7700.00 | Window Closed / Lapsed |