Patent US3439945A successfully refreshed from Google Patents.
US3439945A
Expired / Lapsed
US
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Pipe joint seal and method
Assignee: W S SHAMBAN AND Co
•
Filing: 1965-05-26
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Granted: 1969-04-22
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Expires: 1985-05-26
Abstract
No abstract record available.
Inventors
- 👤 Jack A Chambers
- 👤 Leslie A Woodson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:28
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/002; F16L21/005; F16L55/00; F16L55/16; F16L55/168; F16L55/17; F16L55/172
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3104898A
Cited
US1823974A
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US1931922A
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US2888042A
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US3100658A
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US3002770A
Cited
US3212798A
Cited
US3233907A
Cited
US3235293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |