US2662827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well cementing
Assignee: Stanolind Oil and Gas Co
•
Filing: 1946-03-12
•
Granted: 1953-12-15
•
Expires: 1966-03-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:41
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/24; C04B24/38; C04B24/383; C09; C09K; C09K8/00; C09K8/42; C09K8/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A HYDRAULIC CEMENT SLURRY HAVING A RETARDED TENDENCY TO DEHYDRATE PHENYSICALLY AND ADAPTED FOR CEMENTING AN OIL WELL, SAID SLURRY CONSISTING OF PORTLAND CEMENT, WATER, AND A CEMENT WATERLOSS REDUCING ADDITIVE INCLUDING PREHYDRATED STARCH IN AN AMOUNT OF AT LEAST 1.5 PER CENT OF THE WEIGHT OF SAID CEMENT AND IN AN AMOUNT THAT SUBSTANTIALLY INHIBITS THE TENDENCY OF THE SLURRY TO LOSE WATER WHEN SAID SLURRY CONTACTS THE PERMEABLE FORMATIONS PENETRATED BY SAID WELL UNDER ELEVATED PRESSURES.
Claim 2
Dependent Claim
78 words
A HYDRAULIC CEMENT SLURRY HAVING A RETARDED TENDENCY TO DEHYDRATE PHENYSICALLY AND ADAPTED FOR CEMENTING AN OIL WELL, SAID SLURRY CONSISTING OF PORTLAND CEMENT, WATER, AND A CEMENT WATERLOSS REDUCING ADDITIVE INCLUDING PREHYDRATED STARCH IN AN AMOUNT OF AT LEAST 1.5 PER CENT OF THE WEIGHT OF SAID CEMENT AND IN AN AMOUNT THAT SUBSTANTIALLY INHIBITS THE TENDENCY OF THE SLURRY TO LOSE WATER WHEN SAID SLURRY CONTACTS THE PERMEABLE FORMATIONS PENETRATED BY SAID WELL UNDER ELEVATED PRESSURES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |