US2678697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for protecting well casings
Assignee: Union Oil Company of California
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Filing: 1952-02-04
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Granted: 1954-05-18
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Expires: 1972-02-04
Abstract
No abstract record available.
Inventors
- 👤 Paul W Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:22
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/502; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
80 words
A SEMI-SOLID PLASTIC COMPOSITION PREPARED BY DISPERSING AN ALKALI-METAL SOAP OF DISPROPORTIONATED ROSIN AND AN AMOUNT OF AN ALKALINEEARTH METAL BASE AT LEAST EQUAL TO THAT CHEMICALLY EQUIVALENT TO SAID SOAP IN A MINERAL OIL, THE AMOUNT OF SAID SOAP BEING CORRELATED WITH THE VISCOSITY OF SAID MINERAL OIL TO GIVE A COMPOSITION INITIALLY FLUID TO BE READILY HANDLED AND ULTIMATELY SETTING UP TO FORM A PLASTIC SEMI-SOLID HAVING AN A. P. I. SHEAROMETER VALUE ABOVE ABOUT 20LBS./100 SQ. FT.
Claim 2
Dependent Claim
80 words
A SEMI-SOLID PLASTIC COMPOSITION PREPARED BY DISPERSING AN ALKALI-METAL SOAP OF DISPROPORTIONATED ROSIN AND AN AMOUNT OF AN ALKALINEEARTH METAL BASE AT LEAST EQUAL TO THAT CHEMICALLY EQUIVALENT TO SAID SOAP IN A MINERAL OIL, THE AMOUNT OF SAID SOAP BEING CORRELATED WITH THE VISCOSITY OF SAID MINERAL OIL TO GIVE A COMPOSITION INITIALLY FLUID TO BE READILY HANDLED AND ULTIMATELY SETTING UP TO FORM A PLASTIC SEMI-SOLID HAVING AN A. P. I. SHEAROMETER VALUE ABOVE ABOUT 20LBS./100 SQ. FT.
Claim 3
Dependent Claim
28 words
THE METHOD OF PROTECTING WELL CASINGS WHICH COMPRISES FILLING THE ANNULAR SPACE BETWEEN THE WALLS OF THE BORE AND THE CASING WITH THE COMPOSITION DEFINED BY CLAIM 1.
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) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |