US3554583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Couplers for scaffold tubes
Assignee: Burton Delingpole and Co Ltd
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Filing: 1969-08-18
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Granted: 1971-01-12
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Expires: 1989-08-18
Abstract
Abstract THIS INVENTION RELATES TO COUPLERS WHICH SECURE A PAIR OF SCAFFOLD TUBES IN END-TO-END RELATIONSHIP IN BUILDERS SCAFFOLDING AND IS CONCERNED WITH COUPLERS IN WHICH PART OF THE COUPLER BODY IS LOCALLY DEFORMED SO AS TO APPLY LOCAL CLAMPING PRESSURE TO THE SCAFFOLD TUBE WHEN THE COUPLER IS TIGHTENED.
Inventors
- 👤 Jack G Lowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:29
CPC Classifications
E; E04; E04G; E04G7/00; E04G7/02; E04G7/06; E04G7/20; Y; Y10; Y10T; Y10T403/00; Y10T403/49; Y10T403/4941; Y10T403/57; Y10T403/5761; Y10T403/5786
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |