Patent US3493052A successfully refreshed from Google Patents.
US3493052A
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Method and apparatus for manipulating a valve in a well packer
Assignee: Halliburton Co
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Filing: 1968-06-20
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Granted: 1970-02-03
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Expires: 1988-06-20
Abstract
No abstract record available.
Inventors
- 👤 Robert T Evans
- 👤 Gail M Boehm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:49
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B34/00; E21B34/06; E21B34/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2416842A
Cited
US2740479A
Cited
US3151839A
Cited
US3249124A
Cited
US3329209A
Cited
US3422896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |