Patent US3221360A successfully refreshed from Google Patents.
US3221360A
Expired / Lapsed
US
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Marking device construction
Assignee: Blaisdell Pencil Co
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Filing: 1963-03-11
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Granted: 1965-12-07
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Expires: 1983-03-11
Abstract
No abstract record available.
Inventors
- 👤 Robert W Seeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:32
CPC Classifications
B; B43; B43K; B43K23/00; B43K23/08; B43K23/12; B43K8/00; B43K8/02; B43K8/04; B43K8/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |