Patent US2628134A successfully refreshed from Google Patents.
US2628134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective collar for drill pipes
Assignee: Ventura Tool Co
•
Filing: 1948-07-17
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Granted: 1953-02-10
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Expires: 1968-07-17
Abstract
No abstract record available.
Inventors
- 👤 William J Williams
- 👤 James W E Hanes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:49
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1042; E21B17/105; Y; Y10; Y10T; Y10T24/00; Y10T24/21; Y10T24/2179
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1030073A
Cited
US1220987A
Cited
US1784516A
Cited
US1994819A
Cited
US2091916A
Cited
US2313459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-10 | 1956-08-11 | 1957-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-10 | 1960-08-11 | 1961-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-10 | 1964-08-11 | 1965-02-10 | $7700.00 | Window Closed / Lapsed |