Patent US3552754A successfully refreshed from Google Patents.
US3552754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube plate seal
Assignee: United States Department of the Interior
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Filing: 1969-09-15
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Granted: 1971-01-05
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Expires: 1989-09-15
Abstract
Abstract A TUBE TO TUBE PLATE SEAL WHEREIN THE PLATE IS PROVIDED WITH HOLES THROUGH WHICH THE TUBES EXTEND, COMPRISING A MOLDED CYLINDRICAL RESILIENT INSERT TO THE DISPOSED BETWEEN THE TUBE AND TUBE PLATE HAVING AT ONE END A RADIALLY EXTENDING FLANGE ENGAGING A SURFACE OF THE TUBE PLATE, AT THE OTHER END AN INWARDLY TAPERED INNER SURFACE ENGAGING THE OUTSIDE OF THE TUBE, AND INTERMEDIATE THE TAPERED END AND FLANGE, A PERIPHERAL RAISED AREA ENGAGING THE PLATE AND HOLDING THE INSERT WITHIN THE PLATE HOLE AND THE TAPERED END IN SEALING ENGAGEMENT WITH THE TUBE.
Inventors
- 👤 William J Bow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:24
CPC Classifications
F; F16; F16J; F16J15/00
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |