US2692684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-pressure filter
Assignee: Individual
•
Filing: 1952-01-16
•
Granted: 1954-10-26
•
Expires: 1972-01-16
Abstract
No abstract record available.
Inventors
- 👤 William W Hallinan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:20
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/44; B01D29/46; B01D25/00; B01D25/30; B01D35/00; B01D35/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US828657A
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US1076128A
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US1456946A
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US2184761A
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US2468960A
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US2585863A
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US2588284A
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US2583423A
Cited
US2604994A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-25 | 1958-04-26 | 1958-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-25 | 1962-04-26 | 1962-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-25 | 1966-04-26 | 1966-10-26 | $7700.00 | Window Closed / Lapsed |