US2648439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Permutit Co
•
Filing: 1950-11-01
•
Granted: 1953-08-11
•
Expires: 1970-11-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Durando Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:02
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/46; B01D24/4631; B01D24/02; B01D24/20; B01D24/22
Claims Analysis
Total Claims: 0
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GB190513947A
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US1708421A
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US1949650A
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US2102639A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |