US3064728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heavy oil production by thermal methods
Assignee: California Research LLC
•
Filing: 1960-01-04
•
Granted: 1962-11-20
•
Expires: 1980-01-04
Abstract
No abstract record available.
Inventors
- 👤 George D Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:04
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A METHOD FOR ASSISTING THE RECOVERY OF OIL FROM A PETROLEUM-BEARING FORMATION PENETRATED BY AT LEAST ONE INJECTION WELL AND ONE RECOVERY WELL COMPRISING IGNITING
Claim 2
Independent Claim
25 words
A METHOD FOR ASSISTING THE RECOVERY OF OIL FROM A PETROLEUM-BEARING FORMATION PENETRATED BY AT LEAST ONE INJECTION WELL AND ONE RECOVERY WELL COMPRISING IGNITING
References Cited (Backward Citations)
US1899497A
Cited
US2778071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |