US2827175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for increasing the capacity of a precoat filter
Assignee: American Machine and Metals Inc
•
Filing: 1955-02-24
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Granted: 1958-03-18
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Expires: 1975-02-24
Abstract
No abstract record available.
Inventors
- 👤 Henry C Cataldo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:27
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/06; B01D33/073; B01D33/44; B01D33/46; B01D33/466
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1773476A
Cited
US1880005A
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DE671703C
Cited
DE696675C
Cited
US2265386A
Cited
US2371417A
Cited
DE893641C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |