US3605574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid impervious expansion joint
Assignee: Individual
•
Filing: 1969-05-21
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Granted: 1971-09-20
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Expires: 1989-05-21
Abstract
Abstract AN EXPANSION JOINT ASSEMBLY HAVING A SEAL IN THE FORM OF A RESILIENT RIGHT-CIRCULAR CYLINDER HAVING A ROLLING CONTACT WITH SUPERPOSED SURFACES OF COOPERATING RELATIVELY MOVEABLE JOINT ELEMENTS. THE SURFACES ARE ADVANTAGEOUSLY PLANES ORIENTED PARALLEL TO THE DIRECTION OF RELATIVE MOVEMENT. WHERE THE JOINT IS SUBJECT TO LOADS, AS IN ROADWAY JOINTS, THE SEAL CYLINDER IS PRELOADED TO THE ORDER OF THE MAXIMUM ANTICIPATED LOADING TO MINIMIZE ITS DEFLECTION WHEN LOADED BY VEHICLES RIDING ACROSS ITS SURFACE.
Inventors
- 👤 Frank K Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:52
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/02; E01C11/04; E01C11/12; E01C11/126; E01D; E01D19/00; E01D19/06; E01D19/065; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; E04B1/6809
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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |