US3008453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing instruments
Assignee: David Kahn Inc
•
Filing: 1958-04-03
•
Granted: 1961-11-14
•
Expires: 1978-04-03
Abstract
No abstract record available.
Inventors
- 👤 Kahn David
- 👤 Helen E Weisser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:14
CPC Classifications
B; B43; B43K; B43K7/00; B43K7/02; B43K7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB722448A
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DE907384C
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FR1109090A
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FR1107642A
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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) | 1964-11-13 | 1965-05-15 | 1965-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-13 | 1969-05-15 | 1969-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-13 | 1973-05-15 | 1973-11-14 | $7700.00 | Window Closed / Lapsed |