US3042427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple string tubing hangers
Assignee: Armco Inc
•
Filing: 1957-06-26
•
Granted: 1962-07-03
•
Expires: 1977-06-26
Abstract
No abstract record available.
Inventors
- 👤 Jr William W Word
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:45
CPC Classifications
F; F16; F16L; F16L39/00; E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US344137A
Cited
US1963046A
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US2153852A
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US2335355A
Cited
US2780291A
Cited
US2885005A
Cited
US2794505A
Cited
US2889886A
Cited
US2830665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-02 | 1966-01-01 | 1966-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-02 | 1970-01-01 | 1970-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-02 | 1974-01-01 | 1974-07-03 | $7700.00 | Window Closed / Lapsed |