US2646652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal grinding machine
Assignee: Heald Machine Co
•
Filing: 1951-08-16
•
Granted: 1953-07-28
•
Expires: 1971-08-16
Abstract
No abstract record available.
Inventors
- 👤 Harold L Blood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:36
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/18; B24B5/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2107051A
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US2032269A
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US2027627A
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US2047055A
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US2243371A
Cited
US2264179A
Cited
US2478607A
Cited
US2440148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |