US2822158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fluid mining
Assignee: Individual
•
Filing: 1949-03-05
•
Granted: 1958-02-04
•
Expires: 1969-03-05
Abstract
No abstract record available.
Inventors
- 👤 Willard C Brinton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:34
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/22; E21B17/00; E21B17/20; E21B43/00; E21B43/29; E21B43/292; E21B7/00; E21B7/04; E21B7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |