US2444003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing implement
Assignee: Eagle Pencil Co
•
Filing: 1945-01-19
•
Granted: 1948-06-22
•
Expires: 1965-01-19
Abstract
No abstract record available.
Inventors
- 👤 Chesler Isidor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:04
CPC Classifications
B; B43; B43K; B43K1/00; B43K1/08; B43K7/00; B43K7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US381731A
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US448939A
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US1181574A
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US1663665A
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US2096397A
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US2107424A
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CH218660A
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US2204778A
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US2333451A
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US2349322A
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US2376222A
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US2413904A
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US2397229A
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GB564173A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |