US2842449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsion cement
Assignee: Pan American Petroleum Corp
•
Filing: 1956-08-13
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Granted: 1958-07-08
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Expires: 1976-08-13
Abstract
No abstract record available.
Inventors
- 👤 William G Bearden
- 👤 George C Howard
- 👤 Iii Robert B Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:03
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/24; C04B24/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A LIGHTWEIGHT CEMENT COMPOSITION SUITABLE FOR WELL CEMENTING OPERATIONS, SAID COMPOSITION CONSISTING ESSENTIALLY OF NONVOLATILE MINERAL OIL, WATE, AND ASTM PORTLAND CEMENT, WHICH ARE PRESENT IN THE RELATIVE PERCENTAGES BY WEIGHT LYING WITHIN THE AREA DEFINED IN THE ACCOMPANYING DIAGRAM BY THE LINES AB, BC, CD, AND DA.
Claim 2
Dependent Claim
48 words
A LIGHTWEIGHT CEMENT COMPOSITION SUITABLE FOR WELL CEMENTING OPERATIONS, SAID COMPOSITION CONSISTING ESSENTIALLY OF NONVOLATILE MINERAL OIL, WATE, AND ASTM PORTLAND CEMENT, WHICH ARE PRESENT IN THE RELATIVE PERCENTAGES BY WEIGHT LYING WITHIN THE AREA DEFINED IN THE ACCOMPANYING DIAGRAM BY THE LINES AB, BC, CD, AND DA.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |