US3138471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid-resistant cement products
Assignee: Standard Oil Co
•
Filing: 1960-09-23
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Granted: 1964-06-23
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Expires: 1980-09-23
Abstract
No abstract record available.
Inventors
- 👤 James F Wygant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:12
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A CHEMICALLY-SETTING, ACID-RESISTANT CEMENT PRODUCT PREPARED FROM A MIX COMPRISING SILICA SAND IN AN AMOUNT OF ABOUT 1000 PARTS BY WEIGHT, SILICATE OF SODA IN AN AMOUNT BETWEEN ABOUT 100 TO ABOUT 250 PARTS BY WEIGHT, SILICA FLOUR IN AN AMOUNT BETWEEN ABOUT 200 AND ABOUT 1000 PARTS BY WEIGHT, SODIUM SILICO-FLOURIDE IN AN AMOUNT BETWEEN ABOUT 12 AND ABOUT 500 PARTS BY WEIGHT, AND A FULLY BASIC SODIUM PHOSPHATE OF THE GROUP CONSISTING OF SODIUM ORTHOPHOSPHATE, SODIUM TRIPOLYUPHOSPHATE AND SODIUM HEXAMETAPHOSPHATE IN AN AMOUNT BETWEEN ABOUT 6 AND ABOUT 100 PARTS BY WEIGHT, THE COMBINED AMOUNTS OF SAID SODIUM SILICO-FLUORIDE AND SAID PHOSPHATE BEING EFFECTIVE TO CAUSE SAID ACID-RESISTANT CEMENT TO SET.
Claim 2
Dependent Claim
113 words
A CHEMICALLY-SETTING, ACID-RESISTANT CEMENT PRODUCT PREPARED FROM A MIX COMPRISING SILICA SAND IN AN AMOUNT OF ABOUT 1000 PARTS BY WEIGHT, SILICATE OF SODA IN AN AMOUNT BETWEEN ABOUT 100 TO ABOUT 250 PARTS BY WEIGHT, SILICA FLOUR IN AN AMOUNT BETWEEN ABOUT 200 AND ABOUT 1000 PARTS BY WEIGHT, SODIUM SILICO-FLOURIDE IN AN AMOUNT BETWEEN ABOUT 12 AND ABOUT 500 PARTS BY WEIGHT, AND A FULLY BASIC SODIUM PHOSPHATE OF THE GROUP CONSISTING OF SODIUM ORTHOPHOSPHATE, SODIUM TRIPOLYUPHOSPHATE AND SODIUM HEXAMETAPHOSPHATE IN AN AMOUNT BETWEEN ABOUT 6 AND ABOUT 100 PARTS BY WEIGHT, THE COMBINED AMOUNTS OF SAID SODIUM SILICO-FLUORIDE AND SAID PHOSPHATE BEING EFFECTIVE TO CAUSE SAID ACID-RESISTANT CEMENT TO SET.
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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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |