Patent US2988859A successfully refreshed from Google Patents.
US2988859A
Expired / Lapsed
US
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Expansible honing tool head
Assignee: Individual
•
Filing: 1959-03-24
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Granted: 1961-06-20
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Expires: 1979-03-24
Abstract
No abstract record available.
Inventors
- 👤 Chaffey Stephen James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:39
CPC Classifications
B; B24; B24B; B24B33/00; B24B33/08; B24B33/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2257474A
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US2290739A
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US2342599A
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US2422296A
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US2438673A
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US2472049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |