Patent US2644280A successfully refreshed from Google Patents.
US2644280A
Expired / Lapsed
US
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Sanding disk accessory
Assignee: Unifrax I LLC
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Filing: 1950-09-13
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Granted: 1953-07-07
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Expires: 1970-09-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph R O'neil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:15
CPC Classifications
B; B24; B24D; B24D9/00; B24D9/08; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249981
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US871942A
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US1212628A
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FR730509A
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US2059583A
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GB501744A
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US2189472A
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US2227588A
Cited
US2286208A
Cited
US2376783A
Cited
US2447102A
Cited
US2485295A
Cited
US2480217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |