Patent US3560028A successfully refreshed from Google Patents.
US3560028A
Expired / Lapsed
US
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Pipe joint device
Assignee: Mitsui Chemicals Inc
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Filing: 1968-12-30
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Granted: 1971-02-02
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Expires: 1988-12-30
Abstract
Abstract A PIPE JOINT DEVICE COMPRISING A FIRST TUBULAR MEMBER FORMED ON ONE END PORTION WITH A PROTRUSION, A SECOND TUBULAR MEMBER TO BE CONNECTED TO SAID FIRST TUBULAR MEMBER, AND AN ANNULAR MEMBER FORMED ON ITS INNER CIRCUMFERENTIAL SURFACE WITH AN INCLINED SURFACE WHICH IS TO BE FITED OVER THE OUTER CIRCUMFERENTIAL SURFACE OF SAID SECOND TUBULAR MEMBER.
Inventors
- 👤 Manabu Ohba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:52
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/02; F16L37/04; F16L37/05; F16L33/00; F16L33/18; F16L33/22; F16L33/225
Claims Analysis
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |