Patent US3202520A successfully refreshed from Google Patents.
US3202520A
Expired / Lapsed
US
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Concrete cement composition
Assignee: Resco Products Inc
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Filing: 1964-03-02
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Granted: 1965-08-24
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Expires: 1984-03-02
Abstract
No abstract record available.
Inventors
- 👤 Charles R Enoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:16
CPC Classifications
C; C04; C04B; C04B12/00; C04B12/02; C04B28/00; C04B28/34; C04B28/342
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A CONCRETE CEMENT COMPOSITION SUITABLE FOR BLENDING WITH AGGREGATE TO PREPARE RAPID SETTING CONCRETE WHICH WILL SET WITHIN ABOUT TWO HOURS TO YIELD A NON-HYGROSCOPIC CASE CONCRETE, SAID COMPOSITION CONSISTING ESSENTIALLY OF A UNIFORM BLEND OF A MIXTURE OF A PHOSPHATE DERIVED FROM PHOSPHORIC ACID AND FROM ALUMINA, AND CONTAINING FROM 15 TO 55 WEIGHT PERCENT OF P2O5 AND FROM 45 TO 75 WEIGHT PERCENT OF A LUMINA, AND FROM 5 TO 18 WEIGHT PERCENT OF MAGNESIUM OXIDE.
Claim 2
Dependent Claim
78 words
A CONCRETE CEMENT COMPOSITION SUITABLE FOR BLENDING WITH AGGREGATE TO PREPARE RAPID SETTING CONCRETE WHICH WILL SET WITHIN ABOUT TWO HOURS TO YIELD A NON-HYGROSCOPIC CASE CONCRETE, SAID COMPOSITION CONSISTING ESSENTIALLY OF A UNIFORM BLEND OF A MIXTURE OF A PHOSPHATE DERIVED FROM PHOSPHORIC ACID AND FROM ALUMINA, AND CONTAINING FROM 15 TO 55 WEIGHT PERCENT OF P2O5 AND FROM 45 TO 75 WEIGHT PERCENT OF A LUMINA, AND FROM 5 TO 18 WEIGHT PERCENT OF MAGNESIUM OXIDE.
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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |