US2552305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: E W HIPP
•
Filing: 1947-05-13
•
Granted: 1951-05-08
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Expires: 1967-05-13
Abstract
No abstract record available.
Inventors
- 👤 Fremont W Benedict
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:00
CPC Classifications
B; B01; B01D; B01D37/00; B01D37/02; B01D29/00; B01D29/39
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US482922A
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US1099212A
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US1919448A
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US2013776A
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US2093894A
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US2342035A
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US2332893A
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US2434807A
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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) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |