Patent AT35971B successfully refreshed from Google Patents.
US3051669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous coating compositions for production of shell moulds and process for preparing same
Assignee: Rolls Royce PLC
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Filing: 1959-11-02
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Granted: 1962-08-28
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Expires: 1979-11-02
Abstract
No abstract record available.
Inventors
- 👤 Emblem Harold Garton
- 👤 Mountford Norman Duncan Gerard
- 👤 Morley Charles William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:15
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/167
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A COATING COMPOSITION FOR THE PRODUCTION OF SHELL MOULDS COMPRISING FINELY DIVIDE REFRACTORY POWDER, AN AQUEOUS BINDING LIQUID COMPRISING A MIXTURE OF A SUBSTANTIALLY ELECTROCYTE-FREE SILICA AQUASOL AND A NONCATIONIC EMULSION OF UNPLASTISED POLYVINYL ACETATE, AN AQUEOUS OF SODIUM CARBOXY METHYL CELLULOSE IN A CONCENTRATION NOT EXCEEDING 5 GRAMS OF SAID SODIUM CARBOXY METHYL CELLULOSE IN 100 MILLITITERS OF WATER, THE VISCOSITY OF A 1% SOLUTION DRY WEIGHT OF THE SODIUM CARBOXY METHYL CELLULOSE AT 25*C. BEING 7-15 CENTIPOISES, AND AN ANIONIC WETTING AGENT, THE PROPORTION OF AQUASOL TO EMULSION BEING FROM SUBSTANTIALLY 4:1 TO SUBSTANTIALLY 5:1 BY WEIGHT, AND THE VOLUME OF AQUASOL BEING MORE THAN 8 TIMES THE VOLUME OF THE SAID AQUEOUS SOLUTION.
Claim 2
Dependent Claim
116 words
A COATING COMPOSITION FOR THE PRODUCTION OF SHELL MOULDS COMPRISING FINELY DIVIDE REFRACTORY POWDER, AN AQUEOUS BINDING LIQUID COMPRISING A MIXTURE OF A SUBSTANTIALLY ELECTROCYTE-FREE SILICA AQUASOL AND A NONCATIONIC EMULSION OF UNPLASTISED POLYVINYL ACETATE, AN AQUEOUS OF SODIUM CARBOXY METHYL CELLULOSE IN A CONCENTRATION NOT EXCEEDING 5 GRAMS OF SAID SODIUM CARBOXY METHYL CELLULOSE IN 100 MILLITITERS OF WATER, THE VISCOSITY OF A 1% SOLUTION DRY WEIGHT OF THE SODIUM CARBOXY METHYL CELLULOSE AT 25*C. BEING 7-15 CENTIPOISES, AND AN ANIONIC WETTING AGENT, THE PROPORTION OF AQUASOL TO EMULSION BEING FROM SUBSTANTIALLY 4:1 TO SUBSTANTIALLY 5:1 BY WEIGHT, AND THE VOLUME OF AQUASOL BEING MORE THAN 8 TIMES THE VOLUME OF THE SAID AQUEOUS SOLUTION.
References Cited (Backward Citations)
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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) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |