Patent US2056112A successfully refreshed from Google Patents.
US2056112A
Expired / Lapsed
US
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Pipe joint
Assignee: Pittsburgh Steel Co
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Filing: 1934-12-27
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Granted: 1936-09-29
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Expires: 1954-12-27
Abstract
No abstract record available.
Inventors
- 👤 Edward J Protin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:54
CPC Classifications
F; F16; F16L; F16L15/00; F16L15/001; E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/042; G; G11; G11C; G11C19/00
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) | 1939-09-29 | 1940-03-30 | 1940-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-09-29 | 1944-03-30 | 1944-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-09-29 | 1948-03-30 | 1948-09-29 | $7700.00 | Window Closed / Lapsed |