Patent FR946428A successfully refreshed from Google Patents.
Patent US2833661A successfully refreshed from Google Patents.
US2833661A
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US
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Composition comprising water soluble organic polymer and colloidal silica and process of coating therewith
Assignee: EIDP Inc
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Filing: 1952-11-28
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Granted: 1958-05-06
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Expires: 1972-11-28
Abstract
No abstract record available.
Inventors
- 👤 Ralph K Iler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:00
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/38; D21H19/40; D21H19/44; D21H19/52; D21H19/56; D21H19/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
AN AQUEOUS MEDIUM HAVING AN ALKALI-STABILIZED COLLOIDAL SILICA SOL OF ULTIMATE PARTICLE SIZE IN THE RANGE 0.01 TO 0.03 MICRON DISPERSED THEREIN AND A WATER-SOLUBLE ORGANIC POLYMER DISSOLVED THEREIN, THE POLYMER BEING SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ALCOHOL AND METHYL CELLULOSE AND THE SILICA HAVING A MOLECULAR WEIGHT OF FROM 0.6 MILLION TO 50 MILLION AS DETERMINED BY LIGHT SCATTERING IN AQUEOUS SOLUTION.
Claim 2
Dependent Claim
65 words
AN AQUEOUS MEDIUM HAVING AN ALKALI-STABILIZED COLLOIDAL SILICA SOL OF ULTIMATE PARTICLE SIZE IN THE RANGE 0.01 TO 0.03 MICRON DISPERSED THEREIN AND A WATER-SOLUBLE ORGANIC POLYMER DISSOLVED THEREIN, THE POLYMER BEING SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ALCOHOL AND METHYL CELLULOSE AND THE SILICA HAVING A MOLECULAR WEIGHT OF FROM 0.6 MILLION TO 50 MILLION AS DETERMINED BY LIGHT SCATTERING IN AQUEOUS SOLUTION.
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) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |