Patent US2973237A successfully refreshed from Google Patents.
US2973237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graphical recorder marking pen
Assignee: F L MOSELEY CO
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Filing: 1957-04-25
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Granted: 1961-02-28
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Expires: 1977-04-25
Abstract
No abstract record available.
Inventors
- 👤 Glenn R Whiteley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:32
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/02; G01D15/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1489782A
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US1847918A
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US2199078A
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US2655426A
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US2727308A
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US2673138A
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US2775502A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |