US2581740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fountain pen
Assignee: Individual
•
Filing: 1946-03-27
•
Granted: 1952-01-08
•
Expires: 1966-03-27
Abstract
No abstract record available.
Inventors
- 👤 Russell T Wing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:00
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US427444A
Cited
US576949A
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US586979A
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US758934A
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US1242062A
Cited
DE322353C
Cited
US1501761A
Cited
US2128456A
Cited
US2195430A
Cited
US2289998A
Cited
US2360297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |