US3400493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Belt sanding and polishing machine
Assignee: Unifrax I LLC
•
Filing: 1966-02-16
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Granted: 1968-09-10
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Expires: 1986-02-16
Abstract
No abstract record available.
Inventors
- 👤 William C Keyes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:07
CPC Classifications
B; B24; B24B; B24B21/00; B24B21/04; B24B21/10; Y; Y10; Y10T; Y10T83/00; Y10T83/444; Y10T83/4458; Y10T83/525; Y10T83/536
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |