Patent US3488512A successfully refreshed from Google Patents.
Patent US3225678A successfully refreshed from Google Patents.
US3225678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mine ventilation scheme
Assignee: Joy Manufacturing Co
•
Filing: 1964-07-10
•
Granted: 1965-12-28
•
Expires: 1984-07-10
Abstract
No abstract record available.
Inventors
- 👤 Neal W Densmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:05
CPC Classifications
E; E21; E21F; E21F1/00; E21F1/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS OF VENTILATING AN UNDERGROUND MINING PLAN INCLUDING A MAIN GALLERY HAVING OPPOSITELY EXTENDING BORE HOLES FORMED IN THE LATERAL CONFRONTING SIDES THEREOF COMPRISING, MOVING THE ATMOSPHERE FROM A BORE HOLE BEING FORMED TO A FORMED BORE HOLE ON THE OPPOSITE SIDE OF SUCH GALLERY BY FANS MOUNTED AT SPACED PORTIONS IN A CONDUIT, INITIALLY SEPARATING CERTAIN OF THE PARTICLES IN SUCH ATMOSPHERE BY THE DECLERATION OF SUCH ATMOSPHERE IN THE FORMED BORE HOLE, EXHAUSTING OF SUCH ATMOSPHERE ATMOSPHERE FROM THE FORMED BORE HOEL BY MEANS OF AN ADDITIONAL FAN AND A FILTER, RESPECTIVELY, LOCATED IN SUCH GALLERY.
Claim 2
Dependent Claim
99 words
A PROCESS OF VENTILATING AN UNDERGROUND MINING PLAN INCLUDING A MAIN GALLERY HAVING OPPOSITELY EXTENDING BORE HOLES FORMED IN THE LATERAL CONFRONTING SIDES THEREOF COMPRISING, MOVING THE ATMOSPHERE FROM A BORE HOLE BEING FORMED TO A FORMED BORE HOLE ON THE OPPOSITE SIDE OF SUCH GALLERY BY FANS MOUNTED AT SPACED PORTIONS IN A CONDUIT, INITIALLY SEPARATING CERTAIN OF THE PARTICLES IN SUCH ATMOSPHERE BY THE DECLERATION OF SUCH ATMOSPHERE IN THE FORMED BORE HOLE, EXHAUSTING OF SUCH ATMOSPHERE ATMOSPHERE FROM THE FORMED BORE HOEL BY MEANS OF AN ADDITIONAL FAN AND A FILTER, RESPECTIVELY, LOCATED IN SUCH GALLERY.
References Cited (Backward Citations)
US899509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |