Patent US2665187A successfully refreshed from Google Patents.
US2863679A
Expired / Lapsed
US
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Pipe joint having opposed packing grooves and sealing means therefor
Assignee: Individual
•
Filing: 1954-09-10
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Granted: 1958-12-09
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Expires: 1974-09-10
Abstract
No abstract record available.
Inventors
- 👤 Calvin D Dunbar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:58
CPC Classifications
F; F16; F16L; F16L17/00; F16L17/06; F16L17/08; Y; Y10; Y10S; Y10S285/00; Y10S285/916
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US522633A
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US682026A
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FR448199A
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US1965273A
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US1825962A
Cited
US1866160A
Cited
US2139413A
Cited
US2171217A
Cited
US2641381A
Cited
US2769648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |