US3741898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamed product from sodium silicate and process of manufacture thereof
Assignee: Southwest Research Institute
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Filing: 1971-07-09
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Granted: 1973-06-26
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Expires: 1991-07-09
Abstract
Abstract A SOLIDIFIED FOAMED MTERIAL IS MADE BY FROTHING A MIXTURE OF AN AQUEOUS SOLUTION OF SODIUM SILICATE A SURFACE TENSION DEPRESANT AND A SILICON DIOXIDE POLYMER FORMING AGENT WITH OR WITHOUT THE INCLUSION OF AN ALKALI METAL SILICATE GELLING AGENT. IN ONE FORM, THE PRODUCT IS FREE OF ANY SUBSTANTIAL AMOUNT OF FILLER. IN ANOTHER FORM. A FILLER IS REQUIRED.
Inventors
- 👤 W Mallow
- 👤 R Owen
- 👤 E Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:45
CPC Classifications
C; C04; C04B; C04B22/00; C04B22/0013; C04B28/00; C04B28/006; C04B28/008; Y; Y02; Y02P; Y02P40/00; Y02P40/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |