US2682954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple leaf rotary filter
Assignee: Individual
•
Filing: 1949-09-02
•
Granted: 1954-07-06
•
Expires: 1969-09-02
Abstract
No abstract record available.
Inventors
- 👤 Frank V Burman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:07
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/15; B01D33/21; B01D33/23; B01D33/70; B01D33/74
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE68289C
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US1793289A
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US1967070A
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FR452139A
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US1249835A
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US1734652A
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US2093967A
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US2184451A
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US2207618A
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US2381453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-05 | 1958-01-04 | 1958-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-05 | 1962-01-04 | 1962-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-05 | 1966-01-04 | 1966-07-06 | $7700.00 | Window Closed / Lapsed |