US3477508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of maximizing efficacy of surfactant in flooding water
Assignee: Mobil Oil AS
•
Filing: 1967-10-09
•
Granted: 1969-11-11
•
Expires: 1987-10-09
Abstract
No abstract record available.
Inventors
- 👤 Billy G Hurd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:30
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2800962A
Cited
US3028912A
Cited
US3175610A
Cited
US3302713A
Cited
US3348611A
Cited
US3346047A
Cited
US3369602A
Cited
US3343597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |