Patent US4771950A successfully refreshed from Google Patents.
US3764355A
Expired / Lapsed
US
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Stabilization of positive sol refractory grain slurries
Assignee: EIDP Inc
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Filing: 1971-05-20
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Granted: 1973-10-09
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Expires: 1991-05-20
Abstract
Abstract SLURRIES OF REFRACTORY MATERIAL SUCH AS MOLOCHITE SUSPENDED IN AQUEOUS SOLS OF POSITIVELY CHARGED ALUMINA COATED COLLOIDAL SILICA PARTICLES ARE STABILIZED BY THE ADDITION OF CERTAIN ACIDS, PARTICULARLY HYDROXY SUBSTITUTED ORGANIC ACIDS SUCH AS HYDROXYACETIC ACID.
Inventors
- 👤 E Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:47
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B35/6316; B; B22; B22C; B22C1/00; B22C1/16; B22C1/18; B22C1/183; C09; C09K; C09K23/00
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |