Patent US2945769A successfully refreshed from Google Patents.
US2945769A
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US
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Cement composition
Assignee: BJ Service Inc
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Filing: 1957-08-08
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Granted: 1960-07-19
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Expires: 1977-08-08
Abstract
No abstract record available.
Inventors
- 👤 Armando R Gama
- 👤 Wendell G Markham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:14
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
AN IMPROVED CEMENT SLURRY FOR CEMENTING CASINGS IN THE BOREHOLE OF A WELL CONSISTING ESSENTIALLY OF PORTLAND CEMENT, A POZZOLANIC MATERIAL IN THE RELATIVE PROPORTION OF FROM 10 THROUGH 100% BY WEIGHT OF SAID CEMENT, A GELATINOUS CLAY IN THE RELATIVE PROPORTION OF FROM 10 THROUGH 40% BY WEIGHT OF SAID CEMENT AND WATER TO PROVIDE A PUMPABLE SLURRY.
Claim 2
Dependent Claim
59 words
AN IMPROVED CEMENT SLURRY FOR CEMENTING CASINGS IN THE BOREHOLE OF A WELL CONSISTING ESSENTIALLY OF PORTLAND CEMENT, A POZZOLANIC MATERIAL IN THE RELATIVE PROPORTION OF FROM 10 THROUGH 100% BY WEIGHT OF SAID CEMENT, A GELATINOUS CLAY IN THE RELATIVE PROPORTION OF FROM 10 THROUGH 40% BY WEIGHT OF SAID CEMENT AND WATER TO PROVIDE A PUMPABLE SLURRY.
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) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |