US2806818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic method for forming cavities in shale for storage of fluids
Assignee: Individual
•
Filing: 1955-08-15
•
Granted: 1957-09-17
•
Expires: 1975-08-15
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:48
CPC Classifications
B; B65; B65G; B65G5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
THE METHOD OF FORMING AN UNDERGROUND CAVITY FOR THE STORAGE OF FLUIDS THEREIN, SAID METHOD COMPRISING THE STEPS OF DRILLING A HOLE INTO A SHALE FORMATION, PROVIDING AN ELECTROLYTIC SOLUTION THEREIN, AND CONDUCTING A DIRECT CURRENT THROUGH SAID SOLUTION, THE NEGATIVE TERMINAL OF SAID CURRENT BEING GROUNDED WITH SAID SHALE FORMATION AND THE POSITIVE TERMINAL OF SAID CURRENT BEING IN ELECTRICAL CONTACT WITH SAID SOLUTION.
Claim 2
Independent Claim
65 words
THE METHOD OF FORMING AN UNDERGROUND CAVITY FOR THE STORAGE OF FLUIDS THEREIN, SAID METHOD COMPRISING THE STEPS OF DRILLING A HOLE INTO A SHALE FORMATION, PROVIDING AN ELECTROLYTIC SOLUTION THEREIN, AND CONDUCTING A DIRECT CURRENT THROUGH SAID SOLUTION, THE NEGATIVE TERMINAL OF SAID CURRENT BEING GROUNDED WITH SAID SHALE FORMATION AND THE POSITIVE TERMINAL OF SAID CURRENT BEING IN ELECTRICAL CONTACT WITH SAID SOLUTION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |