US2497659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubing cleaning device
Assignee: Individual
•
Filing: 1944-10-21
•
Granted: 1950-02-14
•
Expires: 1964-10-21
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Davis
- 👤 Virgil B Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:11
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US236490A
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US942312A
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US990801A
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US1395091A
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US1989035A
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US2058267A
Cited
US2245750A
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US2187845A
Cited
US2354245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |