US3448803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for operating a well having a plurality of flow conductors therein
Assignee: Otis Engineering Corp
•
Filing: 1967-02-02
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Granted: 1969-06-10
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Expires: 1987-02-02
Abstract
No abstract record available.
Inventors
- 👤 Phillip S Sizer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:10
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/14; E21B23/00; E21B23/04; E21B23/0413
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2852079A
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US3008522A
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US3263753A
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US3302721A
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US3326290A
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US3322192A
Cited
US3381753A
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US3363693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |