US2908643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of limestone formations
Assignee: Sunoco Inc
•
Filing: 1956-05-02
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Granted: 1959-10-13
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Expires: 1976-05-02
Abstract
No abstract record available.
Inventors
- 👤 William E Thompson
- 👤 Francis A Boyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:21
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/602; Y; Y10; Y10S; Y10S507/00; Y10S507/935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
METHOD OF FACILITATING THE FLOW OF HYDROCARBONS FROM A LIMESTONE FORMATIOM INTO A BOREHOLE WHICH COMPRISES TREATING SUCH LIMESTONE FORMATION WITH A HYDROCARBON SOLUTION CONTAINING 0.05-5% BY WEIGHT OF AN ALIPHATIC AMINE HAVING 8-12 CARBON ATOMS.
Claim 2
Dependent Claim
36 words
METHOD OF FACILITATING THE FLOW OF HYDROCARBONS FROM A LIMESTONE FORMATIOM INTO A BOREHOLE WHICH COMPRISES TREATING SUCH LIMESTONE FORMATION WITH A HYDROCARBON SOLUTION CONTAINING 0.05-5% BY WEIGHT OF AN ALIPHATIC AMINE HAVING 8-12 CARBON ATOMS.
References Cited (Backward Citations)
US2331594A
Cited
US2419755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |