US2981332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well screening method and device therefor
Assignee: Individual
•
Filing: 1957-02-01
•
Granted: 1961-04-25
•
Expires: 1977-02-01
Abstract
No abstract record available.
Inventors
- 👤 Montgomery K Miller
- 👤 William L Kumler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:03
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/24; E; E21; E21B; E21B43/00; E21B43/02; E21B43/04; E21B43/08; E21B43/082; E21B43/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US572848A
Cited
US934076A
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US921337A
Cited
US1604386A
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US2167191A
Cited
US2613747A
Cited
US2581070A
Cited
US2611436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |