US2646846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well cementing materials and their application
Assignee: Phillips Petroleum Co
•
Filing: 1950-12-04
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Granted: 1953-07-28
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Expires: 1970-12-04
Abstract
No abstract record available.
Inventors
- 👤 Howard G Cutforth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:30
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
THE PROCESS OF PRODUCING A HYDRAULIC CEMENT AQUEOUS SLURRY HAVING A REDUCED WATER-LOSS TO POROUS FORMATIONS, WHICH COMPRISES ADMIXING FROM 0.1 TO 3.0 PER CENT OF A WATER-SOLUBLE ALKALI METAL POLYVINYL SULFATE WITH A HYDRAULIC CEMENT BASED ON THE DRY WEIGHT OF SAID CEMENT, AND MIXING THE RESULTING ADMIXTURE WITH SUFFICIENT WATER TO PRODUCE A FLUID SLURRY.
Claim 2
Dependent Claim
57 words
THE PROCESS OF PRODUCING A HYDRAULIC CEMENT AQUEOUS SLURRY HAVING A REDUCED WATER-LOSS TO POROUS FORMATIONS, WHICH COMPRISES ADMIXING FROM 0.1 TO 3.0 PER CENT OF A WATER-SOLUBLE ALKALI METAL POLYVINYL SULFATE WITH A HYDRAULIC CEMENT BASED ON THE DRY WEIGHT OF SAID CEMENT, AND MIXING THE RESULTING ADMIXTURE WITH SUFFICIENT WATER TO PRODUCE A FLUID SLURRY.
References Cited (Backward Citations)
US2188767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |