US3256068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the production of silica pigments
Assignee: BURKE
•
Filing: 1961-10-03
•
Granted: 1966-06-14
•
Expires: 1981-10-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Oliver W Burke
- 👤 Carey B Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:21
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01B33/187; C01B33/193
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
APPARATUS FOR THE CONTINUOUS PRODUCTION OF SILICA PIGMENT BY THE ACIDULATION OF AQUEOUS SODIUM SILICATE SOLUTION, SAID APPARATUS COMPRISING (A) MEANS EMBRACING A SERIES OF REACTION ZONE, (B) MEANS FOR TURBENTLY FLOWING AQUEOUS SODIUM SILICATE SOLUTION IN A SINGLE PASS THROUGH SAID ZONES IN SEQUENCE, AND (C) MEANS IN MORE THAN ONE OF SAID ZONES FOR INJECTING THEREINTO ACIDULATING FLUID, AND WHEREIN SAID MEANS (A) COMPRISES A CLOSED ELONGATED CONDUIT HAVING AN INLET MEANS AT ONE END FOR INTRODUCING AQUEOUS SODIUM SILICATE SOLUTION INTO THE CONDUIT AND HAVING AN OUTLET MEANS AT ITS OTHER END FOR DISCHARGING FROM THE CONDUIT THE SLURRY OF SILIA PIGMENT PRECIPITATE PRODUCED BY THE REACTION, SAID MEANS (C) COMPRISING A SERIES OF INLET MEANS FOR ACIDULATING GAS SPACED
Claim 2
Dependent Claim
123 words
APPARATUS FOR THE CONTINUOUS PRODUCTION OF SILICA PIGMENT BY THE ACIDULATION OF AQUEOUS SODIUM SILICATE SOLUTION, SAID APPARATUS COMPRISING (A) MEANS EMBRACING A SERIES OF REACTION ZONE, (B) MEANS FOR TURBENTLY FLOWING AQUEOUS SODIUM SILICATE SOLUTION IN A SINGLE PASS THROUGH SAID ZONES IN SEQUENCE, AND (C) MEANS IN MORE THAN ONE OF SAID ZONES FOR INJECTING THEREINTO ACIDULATING FLUID, AND WHEREIN SAID MEANS (A) COMPRISES A CLOSED ELONGATED CONDUIT HAVING AN INLET MEANS AT ONE END FOR INTRODUCING AQUEOUS SODIUM SILICATE SOLUTION INTO THE CONDUIT AND HAVING AN OUTLET MEANS AT ITS OTHER END FOR DISCHARGING FROM THE CONDUIT THE SLURRY OF SILIA PIGMENT PRECIPITATE PRODUCED BY THE REACTION, SAID MEANS (C) COMPRISING A SERIES OF INLET MEANS FOR ACIDULATING GAS SPACED
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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) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |