US1940579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joint for concrete and similar pipe
Assignee: Pipe & Joint Improvement Co In
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Filing: 1930-12-16
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Granted: 1933-12-19
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Expires: 1950-12-16
Abstract
No abstract record available.
Inventors
- 👤 Burtnett Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:21
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/10; F16L13/11; F16L13/113
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1936-12-18 | 1937-06-19 | 1937-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-12-18 | 1941-06-19 | 1941-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-12-18 | 1945-06-19 | 1945-12-19 | $7700.00 | Window Closed / Lapsed |