Patent US3051513A successfully refreshed from Google Patents.
US3051513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hanger assembly and seal therefor
Assignee: Vetco Gray LLC
•
Filing: 1959-03-11
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Granted: 1962-08-28
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Expires: 1979-03-11
Abstract
No abstract record available.
Inventors
- 👤 John D Watts
- 👤 Jr Elwood K Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:05
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/0422; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44068
Claims Analysis
Total Claims: 0
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US2318589A
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US2456081A
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US2493556A
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US2553838A
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US2752177A
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US2712455A
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US2754134A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |