Patent US1587689A successfully refreshed from Google Patents.
Patent US3264123A successfully refreshed from Google Patents.
US3264123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fused cast refractory
Assignee: Saint Gobain Ceramics and Plastics Inc
•
Filing: 1962-06-07
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Granted: 1966-08-02
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Expires: 1982-06-07
Abstract
No abstract record available.
Inventors
- 👤 Allen M Alper
- 👤 Robert N Mcnally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:41
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/107
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A FUSED CAST REFRACTORY ARTICLE COMPOSED OF A FUSED MIXTURE CONSISTING ESSENTIALLY OF, ANALYTICALLY IN WEIGHT PERCENT, 0.05% TO 2% FLUORINE, 1.5% TO 25% SIO2 AND AT LEAST 92% TOTAL OF FLUORINE PLUS SIO2 PLUS AL2O3.
Claim 2
Dependent Claim
36 words
A FUSED CAST REFRACTORY ARTICLE COMPOSED OF A FUSED MIXTURE CONSISTING ESSENTIALLY OF, ANALYTICALLY IN WEIGHT PERCENT, 0.05% TO 2% FLUORINE, 1.5% TO 25% SIO2 AND AT LEAST 92% TOTAL OF FLUORINE PLUS SIO2 PLUS AL2O3.
References Cited (Backward Citations)
US2195950A
Cited
US2695849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |