Patent US2791024A successfully refreshed from Google Patents.
US2791024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for burnishing, reaming, and deburring articles
Assignee: AT&T Inc
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Filing: 1954-02-05
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Granted: 1957-05-07
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Expires: 1974-02-05
Abstract
No abstract record available.
Inventors
- 👤 Frank B Vavrinek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:11
CPC Classifications
B; B23; B23G; B23G9/00; B23G9/001; B23G9/003; B23G9/004; Y; Y10; Y10T; Y10T29/00; Y10T29/47; Y10T29/51; Y10T29/5178; Y10T408/00; Y10T408/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1188437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |