Patent US5459602A successfully refreshed from Google Patents.
US3255024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding composition and method
Assignee: Bean Morris and Co
•
Filing: 1962-07-06
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Granted: 1966-06-07
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Expires: 1982-07-06
Abstract
No abstract record available.
Inventors
- 👤 James G Alexander
- 👤 Paul W Wagner
- 👤 Xarifa L Bean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:15
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/162; B22C1/18; B22C1/186; B22C1/188; B22C5/00; B22C5/04; B22C9/00; B22C9/12; B22C9/123
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
IN THE METHOD OF FORMING A DRY HYDRATED CRYSTALLINE SILICATE COATING ON INDIVIDUAL GRAINS OF A GRANULAR REFRACTORY MATERIAL FOR MAKING FOUNDRY MOLDS IN WHICH SAID SILICATE COATING IS ACTIVATED INTO A FIRM ADHESIVE BOND BY REACTION WITH CARBON DIOXIDE AND IN WHICH SAID HYDRATED SILICATE COATING HAS A PREDETERMINED FINAL RATIO OF NA2O TO SIO2, THE STEPS WHICH COMPRISE ADMIXING WITH SAID GRAULAR REFRACTORY MATERIAL A SILICATE SYRUP HAVING AN NA2O-SIO2 RATIO SUBSTANTIALLY MORE SILICIOUS THAN SAID PREDETERMINED FINAL RATIO OF SAID COATING, UNIFORMLY DISTRIBUTING SAID SILICATE SYRUP OVER THE SURFACE OF INDIVIDUAL GRAINS OF SAID GRANULAR REFRACTORY SUBSTANTIALLY AT ROOM TEMPERATURE, THEREAFTER ADMIXING A CONCENTRATED WATER SOLUTION OF SODIUM HYDROXIDE, AFFECTING REACTION BETWEEN SAID SILICATE SYRUP AND SAID SODIUM HYDROXIDE ON SAID INDIVIDUAL GRAINS OF SAID GRANULAR REFRACTORY FORMING SAID HYDRATED SILICATE COATING THEREON WITH THE SAID FINAL NA2O-SIO2 RATIO, AND CONTINUING SAID MIXING UNTIL SAID REACTION IS COMPLETE FORMING SAID HYDRATED SILICATE COATING ON SAID GRAINS TO PROVIDE AN ESSENTIALLY DRY AND FREE-FLOWING MASS OF COATED GRANULAR REFRACTORY.
Claim 2
Dependent Claim
171 words
IN THE METHOD OF FORMING A DRY HYDRATED CRYSTALLINE SILICATE COATING ON INDIVIDUAL GRAINS OF A GRANULAR REFRACTORY MATERIAL FOR MAKING FOUNDRY MOLDS IN WHICH SAID SILICATE COATING IS ACTIVATED INTO A FIRM ADHESIVE BOND BY REACTION WITH CARBON DIOXIDE AND IN WHICH SAID HYDRATED SILICATE COATING HAS A PREDETERMINED FINAL RATIO OF NA2O TO SIO2, THE STEPS WHICH COMPRISE ADMIXING WITH SAID GRAULAR REFRACTORY MATERIAL A SILICATE SYRUP HAVING AN NA2O-SIO2 RATIO SUBSTANTIALLY MORE SILICIOUS THAN SAID PREDETERMINED FINAL RATIO OF SAID COATING, UNIFORMLY DISTRIBUTING SAID SILICATE SYRUP OVER THE SURFACE OF INDIVIDUAL GRAINS OF SAID GRANULAR REFRACTORY SUBSTANTIALLY AT ROOM TEMPERATURE, THEREAFTER ADMIXING A CONCENTRATED WATER SOLUTION OF SODIUM HYDROXIDE, AFFECTING REACTION BETWEEN SAID SILICATE SYRUP AND SAID SODIUM HYDROXIDE ON SAID INDIVIDUAL GRAINS OF SAID GRANULAR REFRACTORY FORMING SAID HYDRATED SILICATE COATING THEREON WITH THE SAID FINAL NA2O-SIO2 RATIO, AND CONTINUING SAID MIXING UNTIL SAID REACTION IS COMPLETE FORMING SAID HYDRATED SILICATE COATING ON SAID GRAINS TO PROVIDE AN ESSENTIALLY DRY AND FREE-FLOWING MASS OF COATED GRANULAR REFRACTORY.
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |