US3257328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic phosphates-stabilization of silica sols and dispersions or suspensions of silica and siliceous materials
Assignee: PQ Corp
•
Filing: 1961-12-06
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Granted: 1966-06-21
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Expires: 1981-12-06
Abstract
No abstract record available.
Inventors
- 👤 Eric W Vessey
- 👤 Robert W Linton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:41
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/14; C01B33/146; C01B33/148; C01B33/1485
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A NOVEL COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF: (A) A HYDRATD PRECIPITATED SILICA, (B) MONO-DI-BUTYL ACID ORTHOPHOSPHATE, AND (C) WATER AS A DISPERSION MEDIUM FOR SAID SILICA AND SAID ORTHOPHOSPHATE, (D) SAID SILICA BEING ABOUT 16.7% BY WEIGHT OF SAID COMPOSITION, SAID ORTHOPHOSPHATE BEING ABOUT 3.3% BY WEIGHT OF SAID COMPOSITION, AND SAID WATER BEING THE REMAINDER OF SAID COMPOSITION.
Claim 2
Dependent Claim
60 words
A NOVEL COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF: (A) A HYDRATD PRECIPITATED SILICA, (B) MONO-DI-BUTYL ACID ORTHOPHOSPHATE, AND (C) WATER AS A DISPERSION MEDIUM FOR SAID SILICA AND SAID ORTHOPHOSPHATE, (D) SAID SILICA BEING ABOUT 16.7% BY WEIGHT OF SAID COMPOSITION, SAID ORTHOPHOSPHATE BEING ABOUT 3.3% BY WEIGHT OF SAID COMPOSITION, AND SAID WATER BEING THE REMAINDER OF SAID COMPOSITION.
References Cited (Backward Citations)
US2524357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |