Patent US2420139A successfully refreshed from Google Patents.
US2420139A
Expired / Lapsed
US
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Pipe joint
Assignee: IRAQ PETROLEUM Co Ltd
•
Filing: 1944-07-08
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Granted: 1947-05-06
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Expires: 1964-07-08
Abstract
No abstract record available.
Inventors
- 👤 Kelly Frederick Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:59
CPC Classifications
F; F16; F16L; F16L15/00; F16L15/006; F16L15/008; F16L13/00; F16L13/02; F16L13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US324598A
Cited
US326469A
Cited
DE600031C
Cited
US670584A
Cited
US1287934A
Cited
CH120595A
Cited
US2187217A
Cited
US2349792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-05 | 1950-11-04 | 1951-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-05 | 1954-11-04 | 1955-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-05 | 1958-11-04 | 1959-05-06 | $7700.00 | Window Closed / Lapsed |