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US3459486A
Expired / Lapsed
US
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Writing utensil
Assignee: JS Staedtler KG
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Filing: 1967-08-03
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Granted: 1969-08-05
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Expires: 1987-08-03
Abstract
No abstract record available.
Inventors
- 👤 Franz Matschkal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:05
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/18; B43K5/1818; B43K5/1827; B43K5/1836; B43K5/1845; B43K8/00; B43K8/16; B43K8/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2401167A
Cited
FR950633A
Cited
US2766728A
Cited
US2766729A
Cited
US2891512A
Cited
FR1244806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |