US3443638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pack-off assembly and method of running pipe
Assignee: HENRY C HAYNIE
•
Filing: 1967-06-09
•
Granted: 1969-05-13
•
Expires: 1987-06-09
Abstract
No abstract record available.
Inventors
- 👤 Henry C Haynie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:13
CPC Classifications
E; E21; E21B; E21B23/00; E21B33/00; E21B33/02; E21B33/03; E21B33/068; E21B33/072; E21B43/00; E21B43/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US169659A
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US747493A
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US1736117A
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US2393404A
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US2574625A
Cited
US2738016A
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US2902093A
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US2994380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |