Patent US3424537A successfully refreshed from Google Patents.
US3424537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fountain pen structures
Assignee: Individual
•
Filing: 1964-07-23
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Granted: 1969-01-28
•
Expires: 1984-07-23
Abstract
No abstract record available.
Inventors
- 👤 Ernst Johan Jens Henriksen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:25
CPC Classifications
B; B43; B43K; B43K7/00; B43K7/02; B43K7/03; B43K7/035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE508048A
Cited
BE509365A
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US933248A
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US2303273A
Cited
US2416896A
Cited
US2495013A
Cited
US2678634A
Cited
FR977272A
Cited
GB695673A
Cited
US2449939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |