US2642041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antileak fountain pen
Assignee: Miessner Inventions Inc
•
Filing: 1951-01-18
•
Granted: 1953-06-16
•
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 14:47
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US237139A
Cited
US274447A
Cited
US888955A
Cited
US1513063A
Cited
US1789387A
Cited
FR818824A
Cited
US2143661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |