US2885366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Product comprising a skin of dense, hydrated amorphous silica bound upon a core of another solid material and process of making same
Assignee: EIDP Inc
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Filing: 1956-06-28
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Granted: 1959-05-05
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Expires: 1976-06-28
Abstract
No abstract record available.
Inventors
- 👤 Ralph K Iler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:05
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0004; C09B67/0007; B; B22; B22F; B22F1/00; B22F1/16; B82; B82Y; B82Y30/00; C03; C03C; C03C25/00; C03C25/10; C03C25/42; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/4584; C09C; C09C1/00; C09C1/36; C09C1/3607; C09C1/3653; C09C1/3661; C09C3/00; C09C3/06; C09C3/063; C09D; C09D1/00; C09K; C09K11/00; C09K11/02; C09K11/025; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/20; H01F1/22; H01F1/24; C01; C01P; C01P2002/00; C01P2002/02; C01P2004/00; C01P2004/10; C01P2004/20; C01P2004/30; C01P2004/32; C01P2004/50; C01P2004/60; C01P2004/61; C01P2004/64; C01P2004/80; C01P2004/82; C01P2004/84; C01P2006/00; C01P2006/12; C01P2006/20; C01P2006/40; C01P2006/60; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
IN A PROCESS FOR MAKING A PRODUCT COMPRISING A SKIN OF DENSE, HYDRATED, AMORPHOUS SILICA BOUND UPON A CORE OF ANOTHER SOLID MATERIAL, THE STEPS COMPRISING ADDING ACTIVE SILICA IN WATER TO AN AQUEOUS SUSPENSION OF A FINELY DIVIDED, WATER INSOLUBLE SOLID MATERIAL OTHER THAN SILICA 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 MILLIMICRONS AND HAVING UPON THEIR SURFACES A METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF OXIDES AND SILICATES OF A METAL WHICH FORMS AN INSOLUBLE SILICATE AT A PH BETWEEN 7 AND 11, THE PH OF SAID SUSPENSION BEING MAINTAINED BETWEEN 60 AND 11, THE TEMPERATURE BEING MAINTAINED BETWEEN 60 AND 125*C., THE ADDITION OF ACTIVE SILICA BEING MADE SLOWLY ENOUGH SO THAT IN THE FOLLOWING EXPRESSION DS IS NO GREATER THAN ZERO: PS@ DS=(A3D3)-(A2D2)
Claim 2
Dependent Claim
150 words
IN A PROCESS FOR MAKING A PRODUCT COMPRISING A SKIN OF DENSE, HYDRATED, AMORPHOUS SILICA BOUND UPON A CORE OF ANOTHER SOLID MATERIAL, THE STEPS COMPRISING ADDING ACTIVE SILICA IN WATER TO AN AQUEOUS SUSPENSION OF A FINELY DIVIDED, WATER INSOLUBLE SOLID MATERIAL OTHER THAN SILICA 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 MILLIMICRONS AND HAVING UPON THEIR SURFACES A METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF OXIDES AND SILICATES OF A METAL WHICH FORMS AN INSOLUBLE SILICATE AT A PH BETWEEN 7 AND 11, THE PH OF SAID SUSPENSION BEING MAINTAINED BETWEEN 60 AND 11, THE TEMPERATURE BEING MAINTAINED BETWEEN 60 AND 125*C., THE ADDITION OF ACTIVE SILICA BEING MADE SLOWLY ENOUGH SO THAT IN THE FOLLOWING EXPRESSION DS IS NO GREATER THAN ZERO: PS@ DS=(A3D3)-(A2D2)
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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |