US2944839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling for reinforced plastic pipe
Assignee: AO Smith Corp
•
Filing: 1958-12-08
•
Granted: 1960-07-12
•
Expires: 1978-12-08
Abstract
No abstract record available.
Inventors
- 👤 Archie C Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:23
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1911570A
Cited
US1679709A
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US2081021A
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US2219047A
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US2245101A
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US2377510A
Cited
US2567773A
Cited
US2506494A
Cited
US2525662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |