US3000749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction product of silica pigment with acidic halides and production thereof
Assignee: PPG Industries Inc
•
Filing: 1957-09-30
•
Granted: 1961-09-19
•
Expires: 1977-09-30
Abstract
No abstract record available.
Inventors
- 👤 John H Bachmann
- 👤 Witt Bernard J De
- 👤 Strain Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:07
CPC Classifications
B; B82; B82Y; B82Y30/00; C; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/309; C09C3/00; C09C3/04; C09C3/043; C09C3/06; C09C3/08; C01; C01P; C01P2002/00; C01P2002/02; C01P2004/00; C01P2004/60; C01P2004/64; C01P2004/80; C01P2004/82; C01P2006/00; C01P2006/12; C01P2006/80; C01P2006/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A METHOD WHICH COMPRISES CONTACTING A SILICA PIGMENT WHICH HAS AN AVERAGE ULTIMATE PARTICLE SIZE BELOW 0.1 MICRON, CONTAINS IN EXCESS OF 80 PERCENT BY WEIGHT OF SIO2, MEASURED ON THE ANHYDROUS BASIS, AND ONE MOLE OF BOUND WATER PER 3 TO 85 MOLES OF SIO2, THE FREE WATER CONTENT OF THE PIGMENT BEING LESS THAN ABOUT 2 PERCENT BY WEIGHT, WITH A HALIDE OF AN ELEMENT OF THE GROUP CONSISTING OF SILICON, TITANIUM, TIN, ALUMINUM, BORON, ANTIMONY, PHSPHOROUS, ARSENIC, GERMANIUM, NIOBIUM, AND SULFUR, SAID CONTACT BEING CONDUCTED SUBSTANTIALLY IN THE ABSENCE OF LIQUID WATER AND BEING CONTINUED UNTIL THE BOUND WATER CONTENT IN THE PIGMENT IS REDUCED, HYDROGEN HALIDE IS EVOLVED, AND A SOLID SILICEOUS REACTION PRODUCT CONTAINING ACID HALIDE IS OBTAINED, AND RECOVERING THE SOLID SILICEOUS REACTION PRODUCT THUS OBTAINED.
Claim 2
Independent Claim
132 words
A METHOD WHICH COMPRISES CONTACTING A SILICA PIGMENT WHICH HAS AN AVERAGE ULTIMATE PARTICLE SIZE BELOW 0.1 MICRON, CONTAINS IN EXCESS OF 80 PERCENT BY WEIGHT OF SIO2, MEASURED ON THE ANHYDROUS BASIS, AND ONE MOLE OF BOUND WATER PER 3 TO 85 MOLES OF SIO2, THE FREE WATER CONTENT OF THE PIGMENT BEING LESS THAN ABOUT 2 PERCENT BY WEIGHT, WITH A HALIDE OF AN ELEMENT OF THE GROUP CONSISTING OF SILICON, TITANIUM, TIN, ALUMINUM, BORON, ANTIMONY, PHSPHOROUS, ARSENIC, GERMANIUM, NIOBIUM, AND SULFUR, SAID CONTACT BEING CONDUCTED SUBSTANTIALLY IN THE ABSENCE OF LIQUID WATER AND BEING CONTINUED UNTIL THE BOUND WATER CONTENT IN THE PIGMENT IS REDUCED, HYDROGEN HALIDE IS EVOLVED, AND A SOLID SILICEOUS REACTION PRODUCT CONTAINING ACID HALIDE IS OBTAINED, AND RECOVERING THE SOLID SILICEOUS REACTION PRODUCT THUS OBTAINED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |