Patent US2914413A successfully refreshed from Google Patents.
US2914413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cement composition and method of preparation
Assignee: Pennwalt Corp
•
Filing: 1958-01-30
•
Granted: 1959-11-24
•
Expires: 1978-01-30
Abstract
No abstract record available.
Inventors
- 👤 Robert S Mercer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:27
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
AS COLD SETTING CEMENT COMPOSITION THE COMBINATION OF A PARTICULATE FILLER CONTRIBUTING THE MAJOR PROPORTION OF THE SOLIDS CONTENT OF THE CEMENT, AN AQUEOUS SILICA SOL AS AS BINDER FOR SAID FILLER IN AN AMOUNT SUFFICIENT TO BOND SAID FILLER INTO A COHERENT MASS, AND FROM 92% TO 15% BY WEIGHT BASED ON THE WEIGHT OF SAID FILLER, OF A SOLID ALKALI METAL SILICATE AS A ALKALI METAL OXIDE TO SILICA SOL, SAID SILICATE HAVING AN ALKALI METAL OXIDE TO SILICA MOLE RATIO WITHIN THE RANGE OF FROM 1:1 TO 1:4,2 SAID FILLER BEING ESSENTIALLY INSOLUBLE IN THE WATER OF SAID SILICA SOL AND BEING SUBSTANTIALLY INERT EITH RESPECT TO SAID SOL.
Claim 2
Dependent Claim
112 words
AS COLD SETTING CEMENT COMPOSITION THE COMBINATION OF A PARTICULATE FILLER CONTRIBUTING THE MAJOR PROPORTION OF THE SOLIDS CONTENT OF THE CEMENT, AN AQUEOUS SILICA SOL AS AS BINDER FOR SAID FILLER IN AN AMOUNT SUFFICIENT TO BOND SAID FILLER INTO A COHERENT MASS, AND FROM 92% TO 15% BY WEIGHT BASED ON THE WEIGHT OF SAID FILLER, OF A SOLID ALKALI METAL SILICATE AS A ALKALI METAL OXIDE TO SILICA SOL, SAID SILICATE HAVING AN ALKALI METAL OXIDE TO SILICA MOLE RATIO WITHIN THE RANGE OF FROM 1:1 TO 1:4,2 SAID FILLER BEING ESSENTIALLY INSOLUBLE IN THE WATER OF SAID SILICA SOL AND BEING SUBSTANTIALLY INERT EITH RESPECT TO SAID SOL.
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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |