US2848340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slow setting cement compositions
Assignee: Lone Star Cement Corp
•
Filing: 1956-07-05
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Granted: 1958-08-19
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Expires: 1976-07-05
Abstract
No abstract record available.
Inventors
- 👤 Walter J Haldas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:48
CPC Classifications
C; C04; C04B; C04B7/00; C04B24/00; C04B24/003; C04B28/00; C04B28/02; C04B28/04; C09; C09K; C09K8/00; C09K8/42; C09K8/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A SLOW SETTING CEMENT COMPOSITION SUITABLE FOR THE CEMENTATION OF OIL WELLS AT DEPTHS IN EXCESS OF 8,000 FEET CONSITING ESSENTIALLY OF PORTLAND CEMENT AND FROM ABOUT 0.1% TO ABOUT 2.0% BY WEIGHT, BASED ON THE DRY CEMENT, OF A LOWER ALKYL ACID PHOSPHATE.
Claim 2
Dependent Claim
44 words
A SLOW SETTING CEMENT COMPOSITION SUITABLE FOR THE CEMENTATION OF OIL WELLS AT DEPTHS IN EXCESS OF 8,000 FEET CONSITING ESSENTIALLY OF PORTLAND CEMENT AND FROM ABOUT 0.1% TO ABOUT 2.0% BY WEIGHT, BASED ON THE DRY CEMENT, OF A LOWER ALKYL ACID PHOSPHATE.
References Cited (Backward Citations)
US2233973A
Cited
US2582459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |