US2644280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sanding disk accessory
Assignee: Unifrax I LLC
•
Filing: 1950-09-13
•
Granted: 1953-07-07
•
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 15:10
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US871942A
Cited
US1212628A
Cited
FR730509A
Cited
US2059583A
Cited
GB501744A
Cited
US2189472A
Cited
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 |