Patent US2597872A successfully refreshed from Google Patents.
US2597872A
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Aqueous dispersions of water-insoluble organic polymers containing colloidal silica
Assignee: EIDP Inc
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Filing: 1950-07-03
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Granted: 1952-05-27
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Expires: 1970-07-03
Abstract
No abstract record available.
Inventors
- 👤 Ralph K Her
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:58
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/54; C; C08; C08K; C08K3/00; C08K3/34; C08K3/36; D21H19/38; D21H19/40; D21H19/56; D21H19/58; Y; Y10; Y10S; Y10S516/00; Y10S516/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A COMPOSITION COMPRISING AN AQUEOUS DISPERSION OF A DISPERSED WATER-INSOLUBLE ORGANIC POLYMER AND, PER HUNDRED PARTS BY WEIGHT OF POLYMER, AT LEAST TWO PARTS BY WEIGHT OF AN ALKALISTABILIZED COLLOIDAL SILICA OF ULTIMATE PARTICLE SIZE LESS THAN 0.03 MICRON, THE ALKALI BEING SUBSTANTIALLY ALL OUTSIDE OF THE SILICA PARTICLES WHEREBY CONDENSATION BETWEEN THE SILICA PARTICLES IS RETARDED.
Claim 2
Dependent Claim
57 words
A COMPOSITION COMPRISING AN AQUEOUS DISPERSION OF A DISPERSED WATER-INSOLUBLE ORGANIC POLYMER AND, PER HUNDRED PARTS BY WEIGHT OF POLYMER, AT LEAST TWO PARTS BY WEIGHT OF AN ALKALISTABILIZED COLLOIDAL SILICA OF ULTIMATE PARTICLE SIZE LESS THAN 0.03 MICRON, THE ALKALI BEING SUBSTANTIALLY ALL OUTSIDE OF THE SILICA PARTICLES WHEREBY CONDENSATION BETWEEN THE SILICA PARTICLES IS RETARDED.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |