US3150992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium-aluminate cement and method
Assignee: Standard Oil Co
•
Filing: 1961-01-16
•
Granted: 1964-09-29
•
Expires: 1981-01-16
Abstract
No abstract record available.
Inventors
- 👤 Michael S Crowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:01
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A REFRACTORY MIX WHICH CONSISTS ESSENTIALLY OF ABOUT 5 TO 35 WEIGHT PERCENT CALCIUM ALUMINATE HAVING AN ALUMINA TO CALCIUM OXIDE MOLAR RATIO BETWEEN ABOUT 3:1 TO 2:1, ABOUT 65 TO 95 WEIGHT PERCENT ALUMINA AGGREGATE; AND ABOUT 0.25 TO 6 PERCENT, BASED ON THE COMBINED WEIGHTS OF SAID CALCIUM ALUMINATE AND SAID ALUMINA, OF CAHPO4.
Claim 2
Dependent Claim
56 words
A REFRACTORY MIX WHICH CONSISTS ESSENTIALLY OF ABOUT 5 TO 35 WEIGHT PERCENT CALCIUM ALUMINATE HAVING AN ALUMINA TO CALCIUM OXIDE MOLAR RATIO BETWEEN ABOUT 3:1 TO 2:1, ABOUT 65 TO 95 WEIGHT PERCENT ALUMINA AGGREGATE; AND ABOUT 0.25 TO 6 PERCENT, BASED ON THE COMBINED WEIGHTS OF SAID CALCIUM ALUMINATE AND SAID ALUMINA, OF CAHPO4.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |