US2748749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve-pins for fountain pens
Assignee: Individual
•
Filing: 1952-10-29
•
Granted: 1956-06-05
•
Expires: 1972-10-29
Abstract
No abstract record available.
Inventors
- 👤 Palsic Valentine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:14
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US267180A
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US557149A
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US770612A
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US685918A
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US769427A
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US808880A
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US1104566A
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US1145657A
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US1551019A
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US2183213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |