Patent US3397938A successfully refreshed from Google Patents.
US3397938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbent nib writing device
Assignee: Walter E Heller and Co Inc
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Filing: 1966-02-08
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Granted: 1968-08-20
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Expires: 1986-02-08
Abstract
No abstract record available.
Inventors
- 👤 Juelss David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:48
CPC Classifications
B; B43; B43K; B43K23/00; B43K23/08; B43K23/12; B43K23/126; B43K8/00; B43K8/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB416295A
Cited
GB494991A
Cited
FR985592A
Cited
US2782438A
Cited
US3145412A
Cited
FR1384182A
Cited
US3233275A
Cited
US3278976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |