US2669223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiflood fountain pen
Assignee: Individual
•
Filing: 1951-01-18
•
Granted: 1954-02-16
•
Expires: 1971-01-18
Abstract
No abstract record available.
Inventors
- 👤 Benjamin F Miessner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:50
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US538481A
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US549165A
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US2035278A
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US722013A
Cited
US888955A
Cited
GB190821631A
Cited
FR818824A
Cited
US2152436A
Cited
US2521657A
Cited
US2512004A
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US2619070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |