US3034914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of siliceous products
Assignee: PPG Industries Inc
•
Filing: 1959-05-05
•
Granted: 1962-05-15
•
Expires: 1979-05-05
Abstract
No abstract record available.
Inventors
- 👤 Gosta B Lagerstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:19
CPC Classifications
B; B82; B82Y; B82Y30/00; D; D21; D21H; D21H17/00; D21H17/63; D21H17/67; D21H17/68; C; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C01; C01P; C01P2002/00; C01P2002/02; C01P2004/00; C01P2004/50; C01P2004/60; C01P2004/62; C01P2004/64; C01P2006/00; C01P2006/12; C01P2006/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A METHOD OF PREPARING A SILICEOUS PIGMENT WHICH COMPRISES RAPIDLY DISTRIBUTING IN AN AQUEOUS SILICEOUS SOLUTION HAVING AN SIO2 TO ALKALI METAL OXIDE RATIO SUCH THAT THE SOLUTION UPON STANDING ITSELF WILL PRECIPITATE SILICEOUS MATERIAL SUFFICIENT WATER SOLUBLE INORGANIC SALT TO PRECIPITATE A MAJOR PORTION OF THE SIO2 AS SILICEOUS PIGMENT FROM THE RESULTING MEDIUM BEFORE SUBSTANTIAL OCCURRENCE IN SAID SOLUTION OF SUCH SELF-PRECIPITATION.
Claim 2
Independent Claim
64 words
A METHOD OF PREPARING A SILICEOUS PIGMENT WHICH COMPRISES RAPIDLY DISTRIBUTING IN AN AQUEOUS SILICEOUS SOLUTION HAVING AN SIO2 TO ALKALI METAL OXIDE RATIO SUCH THAT THE SOLUTION UPON STANDING ITSELF WILL PRECIPITATE SILICEOUS MATERIAL SUFFICIENT WATER SOLUBLE INORGANIC SALT TO PRECIPITATE A MAJOR PORTION OF THE SIO2 AS SILICEOUS PIGMENT FROM THE RESULTING MEDIUM BEFORE SUBSTANTIAL OCCURRENCE IN SAID SOLUTION OF SUCH SELF-PRECIPITATION.
References Cited (Backward Citations)
US2679463A
Cited
US2805956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |