US2913419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical process and composition
Assignee: EIDP Inc
•
Filing: 1956-04-18
•
Granted: 1959-11-17
•
Expires: 1976-04-18
Abstract
No abstract record available.
Inventors
- 👤 Guy B Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:37
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/0004; B01J13/0039; B82; B82Y; B82Y30/00; C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/14; C01B33/146; C01B33/149; C09; C09C; C09C1/00; C09C1/22; C09C1/24; C09C1/28; C09C1/30; C09C1/3045; C09C1/3054; C09C1/36; C09C1/3607; C09C1/3653; C09C1/3661; C09C1/40; C09C1/407; C09C3/00; C09C3/06; C09C3/063; C09K; C09K3/00; C01P; C01P2002/00; C01P2002/02; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/50; C01P2004/60; C01P2004/61; C01P2004/64; C01P2004/80; C01P2006/00; C01P2006/12; C01P2006/22; C01P2006/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN A PROCESS FOR MAKING PRODUCTS COMPOSED OF PARTICLES WHICH HAVE A DENSE SKIN OF AMORPHOUS SILICA, CONTAINING CHEMICALLY COMBINED METAL ATOMS CHEMICALLY BOUND UPON A CORE OF ANOTHER SOLID MATERIAL, THE STEP COMPRISING ADDING ACTIVE SILICA TOGETHER WITH A SOLUTION CONTAINING IONS OF A METAL WHICH FORMS AN INSOLUBLE SILICATE AT A PH BETWEEN 5 AND 12 TO AN AQUEOUS SUSPENSION OF A FINELY-DIVIDED, SOLID MATERIAL WHICH HAS A SURFACE AREA OF AT LEAST ONE SQUARE METER PER GRAM, THE PARTICLES OF SAID MATERIAL HAVING A PARTICLE SIZE WITHIN THE RANGE FROM 1 TO 100 MILLMICRONS AND HAVING UPON THEIR SURFACES A COMPOUND SELECTED FROM THE GROUP CONSISTING OF SILICATES, SILICA, AND OXIDES OF METALS WHICH FORMS AN INSOLUBLE SILICATE AT A PH NETWEEN 5 AND 12, THE PH OF SAID SUSPENSION BEING MAINTAINED BETWEEN 8 AND 11 THE TEMPERATURE BEING MAINTAINED BEETWEEN 60 AND 100
Claim 2
Dependent Claim
147 words
IN A PROCESS FOR MAKING PRODUCTS COMPOSED OF PARTICLES WHICH HAVE A DENSE SKIN OF AMORPHOUS SILICA, CONTAINING CHEMICALLY COMBINED METAL ATOMS CHEMICALLY BOUND UPON A CORE OF ANOTHER SOLID MATERIAL, THE STEP COMPRISING ADDING ACTIVE SILICA TOGETHER WITH A SOLUTION CONTAINING IONS OF A METAL WHICH FORMS AN INSOLUBLE SILICATE AT A PH BETWEEN 5 AND 12 TO AN AQUEOUS SUSPENSION OF A FINELY-DIVIDED, SOLID MATERIAL WHICH HAS A SURFACE AREA OF AT LEAST ONE SQUARE METER PER GRAM, THE PARTICLES OF SAID MATERIAL HAVING A PARTICLE SIZE WITHIN THE RANGE FROM 1 TO 100 MILLMICRONS AND HAVING UPON THEIR SURFACES A COMPOUND SELECTED FROM THE GROUP CONSISTING OF SILICATES, SILICA, AND OXIDES OF METALS WHICH FORMS AN INSOLUBLE SILICATE AT A PH NETWEEN 5 AND 12, THE PH OF SAID SUSPENSION BEING MAINTAINED BETWEEN 8 AND 11 THE TEMPERATURE BEING MAINTAINED BEETWEEN 60 AND 100
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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) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |