Patent US4065319A successfully refreshed from Google Patents.
US4065319A
Expired / Lapsed
US
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Tile cements
Assignee: Hercules LLC
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Filing: 1975-11-18
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Granted: 1977-12-27
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Expires: 1995-11-18
Abstract
Abstract Improvements in ceramic wall and floor tiles are effected by incorporating therein as a water retention aid phenyl hydroxyethyl cellulose-hydroxyethyl cellulose, benzyl hydroxyethyl cellulose or ethyl hydroxyethyl cellulose having specified substitution levels.
Inventors
- 👤 Armand Joseph Desmarais
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:26
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/24; C04B24/38; C04B24/383
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
In a dry mortar-forming composition which consists essentially of about 24 to 99% by weight of hydraulic cement, about 0 to 75% sand, about 0 to 2% finely divided fibers, and about 0.4 to 4% of a water-retaining thickener, said dry composition being capable, when mixed with about 25 to 40% of its own weight of water, of producing a mortar which can be applied in thin layers for setting tile on walls and ceilings, the improvement which comprises said water-retaining thickener being a modified hydroxyethyl cellulose having hydroxyethyl M.S. between about 1.5 and 2.8 and a second substituent selected from the class consisting of a. phenylhydroxyethyl at a D.S. level between about 0.04 and 0.15 and b. benzyl at a D.S. level between about 0.04 and 0.15.
Claim 2
Dependent Claim
128 words
In a dry mortar-forming composition which consists essentially of about 24 to 99% by weight of hydraulic cement, about 0 to 75% sand, about 0 to 2% finely divided fibers, and about 0.4 to 4% of a water-retaining thickener, said dry composition being capable, when mixed with about 25 to 40% of its own weight of water, of producing a mortar which can be applied in thin layers for setting tile on walls and ceilings, the improvement which comprises said water-retaining thickener being a modified hydroxyethyl cellulose having hydroxyethyl M.S. between about 1.5 and 2.8 and a second substituent selected from the class consisting of a. phenylhydroxyethyl at a D.S. level between about 0.04 and 0.15 and b. benzyl at a D.S. level between about 0.04 and 0.15.
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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) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |