US3233369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding of materials with hard abrasives
Assignee: Engelhard Hanovia Inc
•
Filing: 1962-05-11
•
Granted: 1966-02-08
•
Expires: 1982-05-11
Abstract
No abstract record available.
Inventors
- 👤 Carle W Highberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:27
CPC Classifications
B; B24; B24D; B24D7/00; B24D7/10; B24B; B24B55/00; B24B55/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1932305A
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US2022521A
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US2823496A
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US2883801A
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US2985898A
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US2867063A
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US3026655A
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US2942387A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |