US2468853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive web material
Assignee: Unifrax I LLC
•
Filing: 1944-09-15
•
Granted: 1949-05-03
•
Expires: 1964-09-15
Abstract
No abstract record available.
Inventors
- 👤 John A Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:14
CPC Classifications
B; B24; B24D; B24D11/00; B24D11/001; B24D11/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US105320A
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US296463A
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US305210A
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US305139A
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US1463611A
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US2027090A
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US2284715A
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US2284716A
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US2284739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |