Patent US3389819A successfully refreshed from Google Patents.
US3262801A
Expired / Lapsed
US
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Process of preparing finely divided silicas of varied properties
Assignee: Nopco Chemical Co
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Filing: 1963-01-30
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Granted: 1966-07-26
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Expires: 1983-01-30
Abstract
No abstract record available.
Inventors
- 👤 Robert E Lally
- 👤 Jr Frederick J Ihde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:59
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01B33/181; C01B33/14; C01B33/141; C01B33/142; C01B33/143; C10; C10M; C10M177/00; C01P; C01P2004/00; C01P2004/80; C10M2201/00; C10M2201/04; C10M2201/041; C10M2201/14; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/08; C10M2215/082; C10M2215/12; C10M2215/24; C10M2215/26; C10M2215/28; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
THE PROCESS FOR PREPARING SILICA FROKM A SILICEOUS AMINO AMINE COMPOSITION COMPRISING IGNITING A SILICEOUS AMONO AMIDE COMPOSITION CONTAINING FROM ABOUT 10% TO 40% BY WEIGHT OF SAID COMPOSITION OF THE REACTION PRODUCT IN WATER OF A SALT WHICH IS AT LEAST WATER-DISPERSIBLE, SAID SALT BEING SELECTED FROM THE GROUP CONSISTING OF PARTIAL AMIDE SALTS, OXAZOLINE SALTS, IMIDAZOLINE SALTS, AND MIXTURES THEREOF WITH A WATER SOLUBLE SILICATE SALT AND FROM ABOUT 60% TO 90% BY WEIGHT OF SAID COMPOSITION, OF SILICA, AT TEMPERATURES OF FROM ABOUT 450*F. TO 2,500*F.
Claim 2
Dependent Claim
89 words
THE PROCESS FOR PREPARING SILICA FROKM A SILICEOUS AMINO AMINE COMPOSITION COMPRISING IGNITING A SILICEOUS AMONO AMIDE COMPOSITION CONTAINING FROM ABOUT 10% TO 40% BY WEIGHT OF SAID COMPOSITION OF THE REACTION PRODUCT IN WATER OF A SALT WHICH IS AT LEAST WATER-DISPERSIBLE, SAID SALT BEING SELECTED FROM THE GROUP CONSISTING OF PARTIAL AMIDE SALTS, OXAZOLINE SALTS, IMIDAZOLINE SALTS, AND MIXTURES THEREOF WITH A WATER SOLUBLE SILICATE SALT AND FROM ABOUT 60% TO 90% BY WEIGHT OF SAID COMPOSITION, OF SILICA, AT TEMPERATURES OF FROM ABOUT 450*F. TO 2,500*F.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |