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US2805872A
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Lined pipe coupling with internally flush gasket
Assignee: Rice Engineering and Operating Inc
•
Filing: 1954-12-03
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Granted: 1957-09-10
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Expires: 1974-12-03
Abstract
No abstract record available.
Inventors
- 👤 Benjamin I Routh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:00
CPC Classifications
F; F16; F16L; F16L15/00; F16L15/001; F16L15/003; Y; Y10; Y10S; Y10S285/00; Y10S285/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE19047E
Cited
US1941174A
Cited
US2070291A
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US2233734A
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US2274477A
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US2318112A
Cited
US2487241A
Cited
GB641125A
Cited
US2684861A
Cited
US2714853A
Cited
GB702806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |