US2813632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for preventing the deformation of plates of filter material in filters
Assignee: Individual
•
Filing: 1954-08-10
•
Granted: 1957-11-19
•
Expires: 1974-08-10
Abstract
No abstract record available.
Inventors
- 👤 Muller Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:05
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/22; B01D25/26; B01D29/00; B01D29/39; B01D29/41; B01D46/00; B01D46/24; B01D46/2403; B01D46/2411
Claims Analysis
Total Claims: 0
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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) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |