Patent US1716553A successfully refreshed from Google Patents.
US2404192A
Expired / Lapsed
US
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Abrasive article and method of making
Assignee: Unifrax I LLC
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Filing: 1944-12-29
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Granted: 1946-07-16
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Expires: 1964-12-29
Abstract
No abstract record available.
Inventors
- 👤 Kernell G Ries
- 👤 Norman P Robie
- 👤 Doenhoff Phyllis Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:01
CPC Classifications
B; B24; B24D; B24D5/00; B24D5/14; B24D18/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-07-15 | 1950-01-14 | 1950-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-07-15 | 1954-01-14 | 1954-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-07-15 | 1958-01-14 | 1958-07-16 | $7700.00 | Window Closed / Lapsed |