US2889228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection of cements from effects of contamination
Assignee: Gulf Oil Corp
•
Filing: 1956-04-27
•
Granted: 1959-06-02
•
Expires: 1976-04-27
Abstract
No abstract record available.
Inventors
- 👤 Horace J Beach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:47
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; C04B24/00; C04B24/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A NEAT CEMENT SLURRY COMPOSITION FOR CEMENTING OF OIL AND GAS WELLS CONSISTING ESSENTIALLY OF PORTLAND CEMENT, FORMALDEHYDE AND WATER, THE FORMALDEHYDE BEING PRESENT IN AMOUNTS BELOW ABOUT 3% OF THE WEIGHT OF THE PORTLAND CEMENT EFFECTIVE TO COUNTERACT CONTAMINATION OF THE CEMENT WITH ORGANIC CONTAMINANTS AND THE AMOUNT OF WATER BEING ABOUT 40 TO 55% BY WEIGHT OF THE CEMENT.
Claim 2
Dependent Claim
61 words
A NEAT CEMENT SLURRY COMPOSITION FOR CEMENTING OF OIL AND GAS WELLS CONSISTING ESSENTIALLY OF PORTLAND CEMENT, FORMALDEHYDE AND WATER, THE FORMALDEHYDE BEING PRESENT IN AMOUNTS BELOW ABOUT 3% OF THE WEIGHT OF THE PORTLAND CEMENT EFFECTIVE TO COUNTERACT CONTAMINATION OF THE CEMENT WITH ORGANIC CONTAMINANTS AND THE AMOUNT OF WATER BEING ABOUT 40 TO 55% BY WEIGHT OF THE CEMENT.
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) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |