US3850397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shoring jack
Assignee: Individual
•
Filing: 1972-03-29
•
Granted: 1974-11-26
•
Expires: 1992-03-29
Abstract
Abstract 1. A JACK SCREW ASSEMBLY FOR USE IN A SHORING SYSTEM COMPRISING A HOLLOW JACK STAFF HAVING A THREADED PORTION, A NUT ON THE THREADED PORTION FOR VERTICAL TRAVEL THEREOVER, A LOADBEARING SLEEVE BEARING AGAINST THE NUT, AND EXTENDING OVER THE JACK STAFF TO THE END THEREOF, AND AN INTERNAL SHAFT FIXED TO THE SLEEVE BUT EXTENDING VERTICALY INTO THE JACK STAFF A DISTANCE GREATER THAN THE LENGTH OF THE THREADED PORTION.
Inventors
- 👤 J Kutchai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:01
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/36; E04G11/48
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |