US2552506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing instrument
Assignee: Eversharp Inc
•
Filing: 1945-12-21
•
Granted: 1951-05-08
•
Expires: 1965-12-21
Abstract
No abstract record available.
Inventors
- 👤 John C Wahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:02
CPC Classifications
B; B43; B43K; B43K7/00; B43K7/02; B43K7/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1580093A
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US1944368A
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US2276722A
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US2302062A
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Cited
US2444004A
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US2398548A
Cited
US2426453A
Cited
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 |