Patent US2364822A successfully refreshed from Google Patents.
Patent US3451491A successfully refreshed from Google Patents.
US3451491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Horizontal drill slide and reconveyor for installing underground lines
Assignee: PATRICK J CLELLAND
•
Filing: 1967-04-27
•
Granted: 1969-06-24
•
Expires: 1987-04-27
Abstract
No abstract record available.
Inventors
- 👤 Patrick J Clelland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:44
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/046
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1932068A
Cited
US2165666A
Cited
US2196260A
Cited
US2210628A
Cited
US2349033A
Cited
US2969121A
Cited
US3107741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |