US2801185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silica hydrosol powder
Assignee: EIDP Inc
•
Filing: 1952-05-16
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Granted: 1957-07-30
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Expires: 1972-05-16
Abstract
No abstract record available.
Inventors
- 👤 Ralph K Iler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:31
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/14; C01B33/145; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
AN ORGANO-DISPERSIBLE POWDER OF HYDROPHOBIC, ING AN AVERAGE SIZE OF FROM 10 TO 60 MILLIMICRONS AND BEING SURFACE-ESTERIFIED WITH A MONOHYDRIC, UNSUBSTITUTED ALCOHOL WHEREIN THE CARBON ATOM ATTACHED TO THE ALCOLHOL OXYGEN IS ALSO ATTACHED TO AT LEAST ONE HYDROGEN AND THE ALCOLHOL MOLECULE CONTAINS FROM 2 TO 18 CARBON ATOMS, THE EXTENT OF SURFACE ESTERIFICATION BEING SUFFICIENT TO MAKE THE SPECIFIC HYDROXYLATED SURFACE AREA OF THE PARTICLES LESS THAN ABOUT 10 M.2/G.
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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 |