US2445963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible joint construction for ceramic pipe
Assignee: NAT CLAY PIPE RES CORP
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Filing: 1945-07-10
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Granted: 1948-07-27
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Expires: 1965-07-10
Abstract
No abstract record available.
Inventors
- 👤 Earle T Montgomery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:05
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/10; F16L13/11; F16L13/116; F16L25/00; F16L25/0027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-27 | 1952-01-26 | 1952-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-27 | 1956-01-26 | 1956-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-27 | 1960-01-26 | 1960-07-27 | $7700.00 | Window Closed / Lapsed |