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Patent US2602549A successfully refreshed from Google Patents.
US2602549A
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Filtering apparatus
Assignee: Peterson Filters and Engineering Co
•
Filing: 1945-10-02
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Granted: 1952-07-08
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Expires: 1965-10-02
Abstract
No abstract record available.
Inventors
- 👤 Peterson Clarence Lynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:48
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/06; B01D33/073
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US620786A
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US1449774A
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US1576374A
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DE532968C
Cited
US1906916A
Cited
GB443475A
Cited
US2102780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |