US2583657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low water-loss cement and process of making
Assignee: Phillips Petroleum Co
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Filing: 1949-07-11
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Granted: 1952-01-29
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Expires: 1969-07-11
Abstract
No abstract record available.
Inventors
- 👤 Peggy J Lea
- 👤 Henry B Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:03
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/42; C09K8/46; C04; C04B; C04B24/00; C04B24/16; C04B24/161; C04B24/168; C09K8/467; C09K8/487; C04B2103/00; C04B2103/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A CEMENT CAPABLE OF FORMING A FLUID SLURRY WHEN MIXED WITH WATER, SAID CEMENT COMPRISING A HYDRAULIC CEMENT FIXED WIT A MINOR PROPORTION OF AT LEAST ONE OF THE GROUP CONSISTING OF ACID ALKYL SULFOETHYL CELLULOSE ETHER AND ALKALI METAL, ALKALINE EARTH METAL AND AMMONIUM SALTS OF THE SAME WHEREIN THE AKYL GROUP CONTAINS FROM 1 TO 3 CARBON ATOMS.
Claim 2
Dependent Claim
60 words
A CEMENT CAPABLE OF FORMING A FLUID SLURRY WHEN MIXED WITH WATER, SAID CEMENT COMPRISING A HYDRAULIC CEMENT FIXED WIT A MINOR PROPORTION OF AT LEAST ONE OF THE GROUP CONSISTING OF ACID ALKYL SULFOETHYL CELLULOSE ETHER AND ALKALI METAL, ALKALINE EARTH METAL AND AMMONIUM SALTS OF THE SAME WHEREIN THE AKYL GROUP CONTAINS FROM 1 TO 3 CARBON ATOMS.
References Cited (Backward Citations)
US2469353A
Cited
US2489793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |