US2829470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for finishing holes in irregular workpieces
Assignee: Barnes Drill Co
•
Filing: 1955-07-22
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Granted: 1958-04-08
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Expires: 1975-07-22
Abstract
No abstract record available.
Inventors
- 👤 Albert M Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:39
CPC Classifications
B; B24; B24B; B24B33/00; B24B33/10; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/561
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) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |