US3179528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature cementing composition
Assignee: Pan American Petroleum Corp
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Filing: 1962-11-26
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Granted: 1965-04-20
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Expires: 1982-11-26
Abstract
No abstract record available.
Inventors
- 👤 Carl R Holmgren
- 👤 William G Bearden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:29
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/42; C09K8/46; C04; C04B; C04B28/00; C04B28/14; C04B2111/00; C04B2111/76; Y; Y10; Y10S; Y10S166/00; Y10S166/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A SETTABLE CEMENT SLURRY SUITABLE FOR USE AT FREEZING TEMPERATURES AND BELOW, CAPABLE OF DEVELOPING GOOD TENSILE STRENGTH AT TEMPERATURES AS LOW AS ABOUT 15*F., COMPRISING ESSENTIALLY A PORTLAND CEMENT-CALCINED GYPSUM MIXTURE RANGING IN COMPOSITION FROM ABOUT EQUAL PARTS OF CEMENT AND CALCINED GYPSUM TO 1 PART OF CEMENT AND ABOUT 3 PARTS OF CALCINED GYPSUM, SAID MIXTURE HAVING ADDED THERETO AN AQUEOUS SOLUTION OF A WATER-MISCIBLE, OXYGENATED ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF ACETONE AND ALCOHOLS, THE SOLVENT BEING PRESENT IN AN AMOUNT SUFFICIENT BOTH TO PROTECT THE CEMENT FROM FREEZING AT THE CURING TEMPERATURE INVOLVED AND TO IMPART TO THE FINAL MIXTURE A PUMPABILITY TIME OF FROM ABOUT ONE TO THREE HOURS.
Claim 2
Dependent Claim
116 words
A SETTABLE CEMENT SLURRY SUITABLE FOR USE AT FREEZING TEMPERATURES AND BELOW, CAPABLE OF DEVELOPING GOOD TENSILE STRENGTH AT TEMPERATURES AS LOW AS ABOUT 15*F., COMPRISING ESSENTIALLY A PORTLAND CEMENT-CALCINED GYPSUM MIXTURE RANGING IN COMPOSITION FROM ABOUT EQUAL PARTS OF CEMENT AND CALCINED GYPSUM TO 1 PART OF CEMENT AND ABOUT 3 PARTS OF CALCINED GYPSUM, SAID MIXTURE HAVING ADDED THERETO AN AQUEOUS SOLUTION OF A WATER-MISCIBLE, OXYGENATED ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF ACETONE AND ALCOHOLS, THE SOLVENT BEING PRESENT IN AN AMOUNT SUFFICIENT BOTH TO PROTECT THE CEMENT FROM FREEZING AT THE CURING TEMPERATURE INVOLVED AND TO IMPART TO THE FINAL MIXTURE A PUMPABILITY TIME OF FROM ABOUT ONE TO THREE HOURS.
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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |