US2637443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pan filter
Assignee: Eimco Corp
•
Filing: 1947-10-03
•
Granted: 1953-05-05
•
Expires: 1967-10-03
Abstract
No abstract record available.
Inventors
- 👤 Daniel M Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:33
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/15; B01D33/17; B01D33/19; B01D33/70; B01D33/72; B01D33/722; B01D33/80; B01D33/82; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86501; Y10T137/86718
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US184427A
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US517240A
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US877579A
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US892275A
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US985611A
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US978381A
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US1284346A
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US1284347A
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US1687863A
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US1778934A
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US1812725A
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GB297394A
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US1765252A
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US1757355A
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US1917818A
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US2222664A
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US2188840A
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US2352330A
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US2354478A
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US2352340A
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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) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |