US3106475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burned refractory product
Assignee: Harbison Walker Refractories Co
•
Filing: 1961-05-29
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Granted: 1963-10-08
•
Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Davies Ben
- 👤 Ernest P Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:04
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
OXYGEN CONVERTER REFRACTORY BRICK CONSISTING ESSENTIALLY OF AT LEAST 96 WEIGHT PERCENT OF MGO, SAID BRICK BEING BURNED AND TAR IMPREGNATED THROUGHOUT AND BEING HIGHLY RESISTANT TO IMPACT, TO ABRASION AND TO SPALLING UNDER ABRUPT TEMPERATURE CHANGES, SAID BRICK HAVING SUBSTANTIALLY NO LOSS IN AN ASTM C-122 PANEL SPALLING TEST WITH A 3000*F. REHEAT.
Claim 2
Dependent Claim
54 words
OXYGEN CONVERTER REFRACTORY BRICK CONSISTING ESSENTIALLY OF AT LEAST 96 WEIGHT PERCENT OF MGO, SAID BRICK BEING BURNED AND TAR IMPREGNATED THROUGHOUT AND BEING HIGHLY RESISTANT TO IMPACT, TO ABRASION AND TO SPALLING UNDER ABRUPT TEMPERATURE CHANGES, SAID BRICK HAVING SUBSTANTIALLY NO LOSS IN AN ASTM C-122 PANEL SPALLING TEST WITH A 3000*F. REHEAT.
References Cited (Backward Citations)
US2952605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-07 | 1967-04-08 | 1967-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-07 | 1971-04-08 | 1971-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-07 | 1975-04-08 | 1975-10-08 | $7700.00 | Window Closed / Lapsed |