US3208674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrothermal fragmentation
Assignee: General Electric Co
•
Filing: 1961-10-19
•
Granted: 1965-09-28
•
Expires: 1981-10-19
Abstract
No abstract record available.
Inventors
- 👤 Francis M Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:48
CPC Classifications
B; B02; B02C; B02C19/00; B02C19/18; E; E21; E21C; E21C37/00; E21C37/18; F; F42; F42D; F42D1/00; F42D3/00; F42D3/04; B02C2019/183
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A METHOD FOR FRAGMENTING A ROCK BY ELECTRICAL ENERGY COMPRISING THE STEPS OF INTRODUCING STEAM INTO THE INTERSTICES OF THE ROCK, ATTACHING ELECTRODES TO THE SURFACE OF THE ROCK, AND APPLYING ELECTRICAL POTENTIAL ACROSS THE ELECTRODES.
Claim 2
Independent Claim
36 words
A METHOD FOR FRAGMENTING A ROCK BY ELECTRICAL ENERGY COMPRISING THE STEPS OF INTRODUCING STEAM INTO THE INTERSTICES OF THE ROCK, ATTACHING ELECTRODES TO THE SURFACE OF THE ROCK, AND APPLYING ELECTRICAL POTENTIAL ACROSS THE ELECTRODES.
References Cited (Backward Citations)
US1719257A
Cited
US1631290A
Cited
US2515542A
Cited
US2859952A
Cited
US2795279A
Cited
US2983453A
Cited
US3038670A
Cited
US3103975A
Cited
US3011726A
Cited
US3106244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |