US3502146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil recovery process with viscous displacing liquid formed in situ
Assignee: Mobil Oil AS
•
Filing: 1967-12-22
•
Granted: 1970-03-24
•
Expires: 1987-12-22
Abstract
No abstract record available.
Inventors
- 👤 Billy G Hurd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:24
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; C09K8/88; C09K8/882; C09K8/58; C09K8/588; E; E21; E21B; E21B43/00; E21B43/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3020953A
Cited
US3116791A
Cited
US2954825A
Cited
US2950760A
Cited
US3175610A
Cited
US3208518A
Cited
US3289759A
Cited
US3352358A
Cited
US3373808A
Cited
US3372748A
Cited
US3396790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-23 | 1973-09-22 | 1974-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-23 | 1977-09-22 | 1978-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-23 | 1981-09-22 | 1982-03-24 | $7700.00 | Window Closed / Lapsed |