Patent US3474866A successfully refreshed from Google Patents.
US3474866A
Expired / Lapsed
US
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Method of and means for sealing casing strings
Assignee: Fenix and Scisson Inc
•
Filing: 1965-10-23
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Granted: 1969-10-28
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Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Thomas B Dellinger
- 👤 James H Cobbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:58
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3289762A
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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) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |