US2880102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well cementing compositions and method of preparing the same
Assignee: Dow Chemical Co
•
Filing: 1956-04-12
•
Granted: 1959-03-31
•
Expires: 1976-04-12
Abstract
No abstract record available.
Inventors
- 👤 George W Woodard
- 👤 Charles L Lunsford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:57
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B22/00; C04B22/08; C04B22/085; C04B24/00; C04B24/04; C09; C09K; C09K8/00; C09K8/42; C09K8/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN A CEMENTING COMPOSITION CONSISTING OF A HYDRAULIC CEMENT, FROM ABOUT 4 PERCENT TO ABOUT 40 PERCENT OF A COLLOIDAL CLAY OF THE GROUP CONSISTING OF BENTONITE, EL PASO SURFACE CLAYS, MONTMORILLONITES, AND THEIR ALKALI AND ALKALINE EARTH METAL SALTS, DRY CEMENTS BASIS AND WATER THE IMPROVEMENT WHICH CONSISTS IN AN ADDITION OF FORM ABOUT 0.5 PERCENT TO ABOUT 10 PERCENT BY WEIGHT, WATER BASIS, OF A MEMBER OF THE GROUP CONSISTING OF LITHIUM, SODIUM, POTASSIUM AND AMMONIUM SALTS OF FORMIC, ACETIC, NITROUS, CHLOROACETIC, GLUCONIC AND TARTARIC ACIDS.
Claim 2
Dependent Claim
88 words
IN A CEMENTING COMPOSITION CONSISTING OF A HYDRAULIC CEMENT, FROM ABOUT 4 PERCENT TO ABOUT 40 PERCENT OF A COLLOIDAL CLAY OF THE GROUP CONSISTING OF BENTONITE, EL PASO SURFACE CLAYS, MONTMORILLONITES, AND THEIR ALKALI AND ALKALINE EARTH METAL SALTS, DRY CEMENTS BASIS AND WATER THE IMPROVEMENT WHICH CONSISTS IN AN ADDITION OF FORM ABOUT 0.5 PERCENT TO ABOUT 10 PERCENT BY WEIGHT, WATER BASIS, OF A MEMBER OF THE GROUP CONSISTING OF LITHIUM, SODIUM, POTASSIUM AND AMMONIUM SALTS OF FORMIC, ACETIC, NITROUS, CHLOROACETIC, GLUCONIC AND TARTARIC ACIDS.
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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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |