US2937618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural sac fountain pen
Assignee: Individual
•
Filing: 1956-06-08
•
Granted: 1960-05-24
•
Expires: 1976-06-08
Abstract
No abstract record available.
Inventors
- 👤 Ribas Manuel Portus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:52
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/02; B43K5/04; Y; Y10; Y10T; Y10T24/00; Y10T24/13; Y10T24/1321; Y10T24/1324; Y10T24/1347
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR964492A
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US682574A
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CH24220A
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US851081A
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US1570026A
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US1609530A
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US1737954A
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US1909130A
Cited
US2002501A
Cited
US2252907A
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US2279803A
Cited
US2498857A
Cited
US2519635A
Cited
US2565667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |