Patent US2437641A successfully refreshed from Google Patents.
US2437641A
Expired / Lapsed
US
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Honing and filing device
Assignee: Individual
•
Filing: 1946-07-06
•
Granted: 1948-03-09
•
Expires: 1966-07-06
Abstract
No abstract record available.
Inventors
- 👤 Robert O Hein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:33
CPC Classifications
B; B24; B24D; B24D15/00; B24D15/02; Y; Y10; Y10T; Y10T407/00; Y10T407/18; Y10T407/1825
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US272345A
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US427965A
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US806962A
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US900938A
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US1022692A
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US1149031A
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US1350884A
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US1554117A
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US1964627A
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US2315749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |