US3579299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous silicate
Assignee: PQ Corp
•
Filing: 1968-07-30
•
Granted: 1971-05-18
•
Expires: 1988-07-30
Abstract
Abstract A LOW BULK DENSITY, CRYSTALLIZED, ALKALINE SODIUM SILICATE OR A DETERGENT CONTAINING A LOW BULK DENSITY, CRYSTALIZED, ALKALINE SODIUM SILICATE IS FORMED BY THE ADDITION OF POWDERED SILICON METAL TO A CRYSTALLIZING MASS OF THE ALKALINE SODIUM SILICATE TO PRODUCE A FORAMENIFEROUS PRODUCT OF UNIFORM POROSITY.
Inventors
- 👤 Robert H Sams
- 👤 Newton W Mccready
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:18
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/02; C11D7/04; C11D7/10; C11D7/14; C01; C01B; C01B33/00; C01B33/20; C01B33/32; C01B33/325; C11D17/00; C11D3/00; C11D3/40
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |