Patent US4834398A successfully refreshed from Google Patents.
US3472280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid diverter
Assignee: Helmerich and Payne Inc
•
Filing: 1967-03-13
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Granted: 1969-10-14
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Expires: 1987-03-13
Abstract
No abstract record available.
Inventors
- 👤 Davis A Van Scoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:19
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/08; G; G01; G01F; G01F25/00; G01F25/10; G01F25/11; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86839
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) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |