Patent US3758316A successfully refreshed from Google Patents.
US3758316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory materials and process for making same
Assignee: EIDP Inc
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Filing: 1971-03-30
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Granted: 1973-09-11
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Expires: 1991-03-30
Abstract
Abstract SMALL DIMENSIONAL CHANGES DURING GELLING, CURING AND DRYING, AND HIGL MOLDULUS OF TRANSVERSE RUPTURE STRENGTHS IN REFRACTORY MATERIALS PREPARED FROM REFRACTORY POWDERS, BINDER PRECURSORS, AND GELLING AGENTS ARE OBTAINED BY CAREFUL CONTROL OF THE AMOUNT OF ACID PRESENT DURING THE GELATION STEP.
Inventors
- 👤 D Sowards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:12
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C04B14/00; C04B14/02; C04B14/30; C04B14/303
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |