Patent US3455380A successfully refreshed from Google Patents.
US3455380A
Expired / Lapsed
US
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Port collar and operating tool therefor
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1968-01-15
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Granted: 1969-07-15
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Expires: 1988-01-15
Abstract
No abstract record available.
Inventors
- 👤 John V Salerni
- 👤 John F De Rochemont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:55
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/12; E21B33/00; E21B33/10; E21B33/12; E21B33/124; E21B33/13; E21B33/14; E21B43/00; E21B43/02; E21B43/04; E21B43/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |