Patent US3432175A successfully refreshed from Google Patents.
US3432175A
Expired / Lapsed
US
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Pipe joint which can be assembled from inside pipe
Assignee: Kubota Iron and Machinery Works Ltd
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Filing: 1966-05-23
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Granted: 1969-03-11
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Expires: 1986-05-23
Abstract
No abstract record available.
Inventors
- 👤 Teiichi Kawai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:56
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/02; F16L21/022; F16L21/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2223223A
Cited
US2162431A
Cited
US2247032A
Cited
US2416917A
Cited
DE852480C
Cited
GB943130A
Cited
US3159302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |