US2791871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Honing machine
Assignee: Barnes Drill Co
•
Filing: 1954-05-03
•
Granted: 1957-05-14
•
Expires: 1974-05-03
Abstract
No abstract record available.
Inventors
- 👤 Albert M Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:46
CPC Classifications
B; B24; B24B; B24B33/00; B24B33/06; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18992
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2294184A
Cited
US2386901A
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US2345581A
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US2343275A
Cited
US2518600A
Cited
US2616225A
Cited
US2688211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |