US2590576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrading apparatus
Assignee: Pangborn Corp
•
Filing: 1934-05-17
•
Granted: 1952-03-25
•
Expires: 1954-05-17
Abstract
No abstract record available.
Inventors
- 👤 William A Rosenberger
- 👤 Walter L Keefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:47
CPC Classifications
B; B24; B24C; B24C5/00; B24C5/06; B24C5/068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB155979A
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US1457113A
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DE519837C
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US1789874A
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US2224647A
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US1971535A
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US2254234A
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US1953566A
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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) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |