US2644218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold and method for forming the bell of a bell-ended pipe
Assignee: Lock Joint Pipe Co
•
Filing: 1948-08-19
•
Granted: 1953-07-07
•
Expires: 1968-08-19
Abstract
No abstract record available.
Inventors
- 👤 Hugh F Kennison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:49
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/70; B28B21/74
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR741838A
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US349265A
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US823963A
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US942922A
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US950578A
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US1204550A
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US1269164A
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US1783605A
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US2216896A
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US2180695A
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US2359755A
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GB583459A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |