US2743781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic anchor tool
Assignee: Guiberson Corp
•
Filing: 1952-08-25
•
Granted: 1956-05-01
•
Expires: 1972-08-25
Abstract
No abstract record available.
Inventors
- 👤 John J Lane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:43
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/01; E21B23/04; E21B23/0411; E21B23/04115
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2603292A
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US1188001A
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US1388490A
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US2034768A
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US2302567A
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US2159640A
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US2381929A
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US2352700A
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US2582719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |