US2525000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter for plate-type heat exchange apparatus
Assignee: Aluminium Plant & Vessel Co
•
Filing: 1945-11-20
•
Granted: 1950-10-10
•
Expires: 1965-11-20
Abstract
No abstract record available.
Inventors
- 👤 Seligman Richard
- 👤 Goodman Hugh Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:44
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/12; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/50; B01D29/52; B01D35/14; B01D35/153
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB192009A
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US1696735A
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US1652173A
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US1568001A
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US1866970A
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US1656455A
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US1794768A
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US1885762A
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US1874054A
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US2300849A
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US2292107A
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US2365074A
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US2333609A
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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) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |