US2801186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and process
Assignee: EIDP Inc
•
Filing: 1954-09-14
•
Granted: 1957-07-30
•
Expires: 1974-09-14
Abstract
No abstract record available.
Inventors
- 👤 Guy B Alexander
- 👤 Ralph K Iler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:04
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/3081; C01; C01P; C01P2002/00; C01P2002/02; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/50; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/12; C01P2006/14; C01P2006/16; C01P2006/19; C01P2006/22; C01P2006/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A HYDROPHOBIC COMPOSITION COMPRISING A SUBSTRATE CONSISTING OF POROUS, SUPERCOLLOIDAL AGGREGATES OF SPHERICAL AMORPHOUS SILICA PARTICLES, THE AGGREGATES HAVING AN AVERAGE PORE DIAMETER OF AT LEAST 4 MILLIMICRONS AND A SURFACE AREA OF FROM 100 TO 600 SQUARE METERS PER GRAM, THERE BEING CHEMICALLY BONDED, THROUGH OXYGEN TO DIFFERENT SILICON ATOMS IN THE SURFACE OF SAID SILICA, HYDROCARBON GROUPS OF 1 TO 18 CARBON ATOMS WHEREIN THE CARBON ATTACHED TO OXYGEN IS ALSO ATTACHED TO HYDROGEN, AND ORGANOSILICON GROUPS OF THE FORMULA RN SI- WHERE R IS A HYDROCARBON GROUP AND N IS AN INTEGER FROM 1 TO 3, THE RATIO OF ORGANOSILICON GROUPS TO HYDROCARBON GROUPS BEING FROM 1:3 TO 16:1, AND THE ORGANOSILICON GROUPS BEING PRESENT AS A MONOLAYER ON THE SILICA.
Claim 2
Dependent Claim
124 words
A HYDROPHOBIC COMPOSITION COMPRISING A SUBSTRATE CONSISTING OF POROUS, SUPERCOLLOIDAL AGGREGATES OF SPHERICAL AMORPHOUS SILICA PARTICLES, THE AGGREGATES HAVING AN AVERAGE PORE DIAMETER OF AT LEAST 4 MILLIMICRONS AND A SURFACE AREA OF FROM 100 TO 600 SQUARE METERS PER GRAM, THERE BEING CHEMICALLY BONDED, THROUGH OXYGEN TO DIFFERENT SILICON ATOMS IN THE SURFACE OF SAID SILICA, HYDROCARBON GROUPS OF 1 TO 18 CARBON ATOMS WHEREIN THE CARBON ATTACHED TO OXYGEN IS ALSO ATTACHED TO HYDROGEN, AND ORGANOSILICON GROUPS OF THE FORMULA RN SI- WHERE R IS A HYDROCARBON GROUP AND N IS AN INTEGER FROM 1 TO 3, THE RATIO OF ORGANOSILICON GROUPS TO HYDROCARBON GROUPS BEING FROM 1:3 TO 16:1, AND THE ORGANOSILICON GROUPS BEING PRESENT AS A MONOLAYER ON THE SILICA.
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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) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |