US3605922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill hole connector device
Assignee: Individual
•
Filing: 1969-07-29
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Granted: 1971-09-20
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Expires: 1989-07-29
Abstract
Abstract A DRILL HOLE CONNECTOR DEVICE FOR USE IN MINES WHICH COMPRISES A HOUSING HAVING A CYLINDRICAL PORTION ADAPTED TO FIT INTO A DRILL HOLE, A RESILIENT RING SURROUNDING THE HOUSING AND BEING CAPABLE OF BEING COMPRESSED BY MEANS OF AN EXTERNAL SLEEVE DISPOSED ABOUT THE HOUSING. THE AXIAL COMPRESSION AND RADIAL EXPANSION OF THE RESILIENT RING HOLDS THE DEVICE IN THE DRILL HOLE.
Inventors
- 👤 Willard I Bergeron
- 👤 John David Gallagher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:27
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/01; E21B21/015; E21B33/00; E21B33/02; E21B33/03; E21B33/068; E21B33/10; E21B33/12; E21B33/128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |