US3016351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving secondary oil recovery
Assignee: GAF Chemicals Corp
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Filing: 1959-10-30
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Granted: 1962-01-09
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Expires: 1979-10-30
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Hessel
- 👤 Francis J Prescott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:48
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
IN THE SECONDARY RECOVERY O FPETROLEUM FROM AN UNDERGROUND FORMATION BY THE WATER FLOODING METHOD WHEREIN WATER IS INJECTED THROUGH AN INPUT WELL INTO AN UNDERGROUND OIL BEARING FORMATION TO FORCE OIL THROUGH SUCH FORMATION TOWARDS OUTPUT WELLS FROM WHICH OIL IS WITHDRAWN, THE STEP OF INCREASING THE INJECTIVITY OF FLOOD WATER INTO AN INPUT WELL, WHICH COMPRISES INTRODUCING THROUGH THE INPUT WELL INTO THE ADJACENT FORMATION A SLIGHTLY WATER MISCIBLE POLYMETHOXY ACETAL OF THE FORMULA
Claim 2
Dependent Claim
76 words
IN THE SECONDARY RECOVERY O FPETROLEUM FROM AN UNDERGROUND FORMATION BY THE WATER FLOODING METHOD WHEREIN WATER IS INJECTED THROUGH AN INPUT WELL INTO AN UNDERGROUND OIL BEARING FORMATION TO FORCE OIL THROUGH SUCH FORMATION TOWARDS OUTPUT WELLS FROM WHICH OIL IS WITHDRAWN, THE STEP OF INCREASING THE INJECTIVITY OF FLOOD WATER INTO AN INPUT WELL, WHICH COMPRISES INTRODUCING THROUGH THE INPUT WELL INTO THE ADJACENT FORMATION A SLIGHTLY WATER MISCIBLE POLYMETHOXY ACETAL OF THE FORMULA
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) | 1965-01-08 | 1965-07-10 | 1966-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-08 | 1969-07-10 | 1970-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-08 | 1973-07-10 | 1974-01-09 | $7700.00 | Window Closed / Lapsed |