US2935970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fountain pen ink reservoir
Assignee: SAPPHIRE PRODUCTS Inc
•
Filing: 1955-03-23
•
Granted: 1960-05-10
•
Expires: 1975-03-23
Abstract
No abstract record available.
Inventors
- 👤 Henry E Morse
- 👤 Noral A Nelson
- 👤 Clifford H Springer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:19
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR1058739A
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FR1078557A
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US2795211A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |