US2320139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible abrasive article
Assignee: Unifrax I LLC
•
Filing: 1941-01-23
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Granted: 1943-05-25
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Expires: 1961-01-23
Abstract
No abstract record available.
Inventors
- 👤 Henry P Kirchner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:48
CPC Classifications
B; B24; B24D; B24D13/00; B24D13/14; A; A47; A47L; A47L13/00; A47L13/10; A47L13/28; A47L13/286
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) | 1946-05-24 | 1946-11-23 | 1947-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-05-24 | 1950-11-23 | 1951-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-05-24 | 1954-11-23 | 1955-05-25 | $7700.00 | Window Closed / Lapsed |