US2711219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil well cementing
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1951-10-20
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Granted: 1955-06-21
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Expires: 1971-10-20
Abstract
No abstract record available.
Inventors
- 👤 Richard A Salathiel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:33
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; C04B24/00; C04B24/16; C04B24/20; C04B24/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
IN THE METHOD OF CEMENTING A CASING IN A WELL WHICH COMPRISES PUMPING DOWN THROUGH THE CASING AND UPWARDLY INTO THE ANNULAR SPACE BETWEEN THE CASING AND THE BOREHOLE AN AQUEOUS PORTLAND CEMENT SLURRY, THE STEPS OF ADDING TO THE CEMENT SLURRY A WATER-SOLUBLE SALT OF A SULFONATED PHENOL-FORMALDEHYDE LINEAR CONDENSATION PRODUCT FORMED FROM A DIFUNCTIONAL MONOCYCLIC PHENO IN AN AMOUNT RANGING BETWEEN 0.2 AND 2.5 PER CENT BY WEIGHT BASED ON THE WEIGHT OF THE SLURRY, THE PHENOL FROM WHICH SAID CONDENSATION PRODUCT IS MADE BEING A MONO-CYCLIC PHENOL.
Claim 2
Dependent Claim
90 words
IN THE METHOD OF CEMENTING A CASING IN A WELL WHICH COMPRISES PUMPING DOWN THROUGH THE CASING AND UPWARDLY INTO THE ANNULAR SPACE BETWEEN THE CASING AND THE BOREHOLE AN AQUEOUS PORTLAND CEMENT SLURRY, THE STEPS OF ADDING TO THE CEMENT SLURRY A WATER-SOLUBLE SALT OF A SULFONATED PHENOL-FORMALDEHYDE LINEAR CONDENSATION PRODUCT FORMED FROM A DIFUNCTIONAL MONOCYCLIC PHENO IN AN AMOUNT RANGING BETWEEN 0.2 AND 2.5 PER CENT BY WEIGHT BASED ON THE WEIGHT OF THE SLURRY, THE PHENOL FROM WHICH SAID CONDENSATION PRODUCT IS MADE BEING A MONO-CYCLIC PHENOL.
References Cited (Backward Citations)
GB231242A
Cited
US1972207A
Cited
AU1524933A
Cited
US2492212A
Cited
US2457160A
Cited
US2546624A
Cited
US2512716A
Cited
US2549507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-20 | 1958-12-20 | 1959-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-20 | 1962-12-20 | 1963-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-20 | 1966-12-20 | 1967-06-21 | $7700.00 | Window Closed / Lapsed |