US2830018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary recovery of oil
Assignee: Sunoco Inc
•
Filing: 1955-12-16
•
Granted: 1958-04-08
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Expires: 1975-12-16
Abstract
No abstract record available.
Inventors
- 👤 William E Thompson
- 👤 Francis A Boyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:35
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/607; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN THE SECONDARY RECOVERY OF PETROLEUM FROM AN UNDERGROUND FORMATION BY THE WATER FLOODING METHOD, THE STEPS OF INCREASING THE INJECTIVITY OF FLOOD WATER INTO AN INPUT WELL WHICH COMPRISES INTRODUCING THROUGH THE WELL INTO THE ADJACENT FORMATION A WATER-MISCIBLE SOLUTION OF AN ORGANIC TREATING AGENT HAVING 1-30 CARBON ATOMS AND SELECTED FROM THE GROUP CONSISTING OF CYANIDES AND ISOCYANIDES.
Claim 2
Dependent Claim
60 words
IN THE SECONDARY RECOVERY OF PETROLEUM FROM AN UNDERGROUND FORMATION BY THE WATER FLOODING METHOD, THE STEPS OF INCREASING THE INJECTIVITY OF FLOOD WATER INTO AN INPUT WELL WHICH COMPRISES INTRODUCING THROUGH THE WELL INTO THE ADJACENT FORMATION A WATER-MISCIBLE SOLUTION OF AN ORGANIC TREATING AGENT HAVING 1-30 CARBON ATOMS AND SELECTED FROM THE GROUP CONSISTING OF CYANIDES AND ISOCYANIDES.
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) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |