Patent US3136645A successfully refreshed from Google Patents.
US3136645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of mineral foam
Assignee: Elkem Metals Co LP
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Filing: 1960-12-20
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Granted: 1964-06-09
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Expires: 1980-12-20
Abstract
No abstract record available.
Inventors
- 👤 Howard M Dess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:48
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A PROCESS FOR THE PRODUCTION OF A SOLIDIFIED MINERAL FOAM WHICH COMPRISES INTIMATELY MIXING SILICA, SILICON, AQUEOUS SODIUM SILICATS SOLUTION WHEREIN THE RATIO OF NA2O TO SIO2 IS IN THE RANGE OF FROM ABOUT 1:3.22 TO ABOUT 1:2.0, SODIUM FLUOSILICATE AND A SURFACE ACTIVE AGENT, SAID SILICA HAVING A MAXIMUM PARTICLE SIZE JOF THROUGH 325 MESH AND BEING PRESENT IN FILLER PROPORTIONS, SAID SILICON HAVING A MAXIMUM PARTICLE SIZE OF THROUGH 400 MESH AND BEING PRESENT IN FOAM-PRODUCING LPROPORTIONS, SAID SODIUM FLUOSILICATE HAVING A MAXIMUM PARTICLE SIZE OF THROUGH 325 MESH AND BEING PRESENT IN SETTING PROPORTIONS, SAID AQUEOUS SODIUM SILICATE SOLUTION BEING PRESENT IN PROPORTIONS SUFFICIENT TO REACT WITH SAID SILICON AND SAID DODIUM FLUOSILICATE TO EFFECT FOAM LLPRODUCTION AND SETTING, RESPECTIVELY, AND SAID SURFACE ACTIVE AGENT BEING A QUATERNARY AMMONIUM SALT OF THE TYPE
Claim 2
Dependent Claim
136 words
A PROCESS FOR THE PRODUCTION OF A SOLIDIFIED MINERAL FOAM WHICH COMPRISES INTIMATELY MIXING SILICA, SILICON, AQUEOUS SODIUM SILICATS SOLUTION WHEREIN THE RATIO OF NA2O TO SIO2 IS IN THE RANGE OF FROM ABOUT 1:3.22 TO ABOUT 1:2.0, SODIUM FLUOSILICATE AND A SURFACE ACTIVE AGENT, SAID SILICA HAVING A MAXIMUM PARTICLE SIZE JOF THROUGH 325 MESH AND BEING PRESENT IN FILLER PROPORTIONS, SAID SILICON HAVING A MAXIMUM PARTICLE SIZE OF THROUGH 400 MESH AND BEING PRESENT IN FOAM-PRODUCING LPROPORTIONS, SAID SODIUM FLUOSILICATE HAVING A MAXIMUM PARTICLE SIZE OF THROUGH 325 MESH AND BEING PRESENT IN SETTING PROPORTIONS, SAID AQUEOUS SODIUM SILICATE SOLUTION BEING PRESENT IN PROPORTIONS SUFFICIENT TO REACT WITH SAID SILICON AND SAID DODIUM FLUOSILICATE TO EFFECT FOAM LLPRODUCTION AND SETTING, RESPECTIVELY, AND SAID SURFACE ACTIVE AGENT BEING A QUATERNARY AMMONIUM SALT OF THE TYPE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |