US2421806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning method and material therefor
Assignee: Turco Products Inc
•
Filing: 1944-04-14
•
Granted: 1947-06-10
•
Expires: 1964-04-14
Abstract
No abstract record available.
Inventors
- 👤 Frank R Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:24
CPC Classifications
B; B24; B24C; B24C11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1184894A
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US1884791A
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US1885760A
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US2062671A
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US2114573A
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US2176577A
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US2185262A
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US2318578A
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US2271537A
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US2332251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-09 | 1950-12-09 | 1951-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-09 | 1954-12-09 | 1955-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-09 | 1958-12-09 | 1959-06-10 | $7700.00 | Window Closed / Lapsed |