US3043371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valved tubing hanger
Assignee: RECTOR WELL EQUIPMENT Co
•
Filing: 1959-07-14
•
Granted: 1962-07-10
•
Expires: 1979-07-14
Abstract
No abstract record available.
Inventors
- 👤 Laurence L Rector
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:23
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/02; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B2200/00; E21B2200/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2094812A
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US1902075A
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US2034698A
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US2003446A
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US2092261A
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US2096565A
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US2673615A
Cited
US2709091A
Cited
US2766830A
Cited
US2859773A
Cited
US2794505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |