US3070169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning interior surfaces of pipe strings
Assignee: Jersey Production Research Co
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Filing: 1961-11-29
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Granted: 1962-12-25
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Expires: 1981-11-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Albert R Hilton
- 👤 Horace H Spain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:21
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02; E21B37/04
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) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |