US2999774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of soil-resistant material
Assignee: Akzo Nobel UK PLC
•
Filing: 1956-12-18
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Granted: 1961-09-12
•
Expires: 1976-12-18
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Schappel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:36
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/32; D06M11/36; D06M11/45; D06M11/51; D06M11/55; D06M11/57; D06M11/77; D06M11/79; D06M2101/00; D06M2101/02; D06M2101/04; D06M2101/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A CONTINUOUS METHOD OF IMPROVING THE SOIL RESISTANCE SUSPENSION OF SILICA HAVING A PARTICLE SIZE OF UNDER 50 MILLIMICRONS WITH A HYDROLIZABLE, ACIDIC, MULTI-VALENT 50 MILLIMICRONS WITH A HYDROLIZABLE, ACIDIC, MULTI-VALENT METAL SALT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, ZINC, MAGNESIUM, FERRIC AND CUPRIC SALTS, AGING THE MIXTURE TO FORM A BATH CONTAINING FROM ABOUT 0.05 TO ABOUT 0.30 PERCENT BY WEIGHT OF SILICA, AT LEAST 90 PERCENT OF THE LATTER MENTIONED SILICA HAVING AN AVERAGE PARTICLE SIZE OF FROM ABOUT 0.5 TO ABOUT 1.5 MICRONS, CONTINUOUSLY PASSING REGENERATED CELLULOSE THROUGH SAID BATH, REMOVING EXCESS BATH FLUID FROM SAID REGENERATED CELLULOSE OF LEAVING SAID BATH, AND THERAFTER DRYING SAID REGENERATED CELLULOSE TO FIX RETAINED SILICIA PARTICLES THEREON.
Claim 2
Dependent Claim
118 words
A CONTINUOUS METHOD OF IMPROVING THE SOIL RESISTANCE SUSPENSION OF SILICA HAVING A PARTICLE SIZE OF UNDER 50 MILLIMICRONS WITH A HYDROLIZABLE, ACIDIC, MULTI-VALENT 50 MILLIMICRONS WITH A HYDROLIZABLE, ACIDIC, MULTI-VALENT METAL SALT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, ZINC, MAGNESIUM, FERRIC AND CUPRIC SALTS, AGING THE MIXTURE TO FORM A BATH CONTAINING FROM ABOUT 0.05 TO ABOUT 0.30 PERCENT BY WEIGHT OF SILICA, AT LEAST 90 PERCENT OF THE LATTER MENTIONED SILICA HAVING AN AVERAGE PARTICLE SIZE OF FROM ABOUT 0.5 TO ABOUT 1.5 MICRONS, CONTINUOUSLY PASSING REGENERATED CELLULOSE THROUGH SAID BATH, REMOVING EXCESS BATH FLUID FROM SAID REGENERATED CELLULOSE OF LEAVING SAID BATH, AND THERAFTER DRYING SAID REGENERATED CELLULOSE TO FIX RETAINED SILICIA PARTICLES THEREON.
References Cited (Backward Citations)
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Cited
DE741887C
Cited
US2690721A
Cited
US2601235A
Cited
US2754221A
Cited
GB728237A
Cited
US2734835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |