US3391543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and technique for installing elongated rods in unstable earth formations
Assignee: Aardvark Corp
•
Filing: 1966-06-23
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Granted: 1968-07-09
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Expires: 1986-06-23
Abstract
No abstract record available.
Inventors
- 👤 Gerald T Sweeney
- 👤 Erdman Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:54
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US890765A
Cited
US2146645A
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US2383496A
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US2798692A
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US2956626A
Cited
FR1243359A
Cited
US3184924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |