US2655265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous rotary pressure or vacuum filter
Assignee: Goslin-Birmingham Manuf Co
•
Filing: 1949-01-31
•
Granted: 1953-10-13
•
Expires: 1969-01-31
Abstract
No abstract record available.
Inventors
- 👤 John W Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:26
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/15; B01D33/21; B01D33/23; B01D33/44; B01D33/46; B01D33/463
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2406065A
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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) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |