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US1905079A
Expired / Lapsed
US
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Rolle cutter retaining device
Assignee: Hughes Tool Co
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Filing: 1931-11-21
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Granted: 1933-04-25
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Expires: 1951-11-21
Abstract
No abstract record available.
Inventors
- 👤 Louis H Wellensiek
- 👤 Jr Fed C Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:06
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/20; E21B10/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1936-04-24 | 1936-10-24 | 1937-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-04-24 | 1940-10-24 | 1941-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-04-24 | 1944-10-24 | 1945-04-25 | $7700.00 | Window Closed / Lapsed |