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US2427733A
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Assignee: Walker Manufacturing Company of Wisconsin
•
Filing: 1945-11-21
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Granted: 1947-09-23
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Expires: 1965-11-21
Abstract
No abstract record available.
Inventors
- 👤 Charles S Mccann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:42
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D29/216; B01D29/50; B01D29/56; B01D29/58; B01D2101/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US853981A
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US1940316A
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US2098102A
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US2092548A
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US2101811A
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US2173978A
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US2197252A
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US2196821A
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US2209180A
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US2369857A
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US2278603A
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US2325399A
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US2386684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-22 | 1951-03-24 | 1951-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-22 | 1955-03-24 | 1955-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-22 | 1959-03-24 | 1959-09-23 | $7700.00 | Window Closed / Lapsed |