US2532248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous polishing device
Assignee: Unifrax I LLC
•
Filing: 1948-06-11
•
Granted: 1950-11-28
•
Expires: 1968-06-11
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Upper
- 👤 Richard A Baumgartner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:32
CPC Classifications
B; B24; B24D; B24D13/00; B24D13/02; B24D13/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US341925A
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US704789A
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US895641A
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US1435721A
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US1822856A
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US1932104A
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US2078437A
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US2284716A
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US2284715A
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US2335902A
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US2375263A
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US2378386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |