Patent US3486559A successfully refreshed from Google Patents.
US3486559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation plugging
Assignee: Pan American Petroleum Corp
•
Filing: 1966-10-13
•
Granted: 1969-12-30
•
Expires: 1986-10-13
Abstract
No abstract record available.
Inventors
- 👤 Don H Flickinger
- 👤 Clarence R Fast
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:45
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/138
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2283645A
Cited
US2546252A
Cited
US2626779A
Cited
US2943680A
Cited
US3153450A
Cited
US3075581A
Cited
US3193011A
Cited
US3280912A
Cited
US3349844A
Cited
US3331438A
Cited
US3323594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |