Patent US4498633A successfully refreshed from Google Patents.
Patent US3390730A successfully refreshed from Google Patents.
US3390730A
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US
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Apparatus for lining a borehole as a boring bit advances in the ground
Assignee: Carrier & Ateliers Stenuick Fr
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Filing: 1966-02-25
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Granted: 1968-07-02
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Expires: 1986-02-25
Abstract
No abstract record available.
Inventors
- 👤 Marcel Leon Emile Ghisla Techy
- 👤 Pierre Andre Emile Stenuick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:34
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1078; E21B10/00; E21B10/64; E21B10/66; E21B19/00; E21B19/08; E21B19/084; E21B4/00; E21B4/06; E21B4/14; E21B7/00; E21B7/20; E21B7/208
Claims Analysis
Total Claims: 0
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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) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |