Patent US3701991A successfully refreshed from Google Patents.
Patent US2380763A successfully refreshed from Google Patents.
US2380763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed for fountain pens
Assignee: American Lead Pencil Co
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Filing: 1944-10-14
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Granted: 1945-07-31
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Expires: 1964-10-14
Abstract
No abstract record available.
Inventors
- 👤 Jucles David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:08
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/18; B43K5/1809
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-07-30 | 1949-01-29 | 1949-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-07-30 | 1953-01-29 | 1953-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-07-30 | 1957-01-29 | 1957-07-31 | $7700.00 | Window Closed / Lapsed |