US2617387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing instrument
Assignee: WA Sheaffer Pen Co
•
Filing: 1947-01-17
•
Granted: 1952-11-11
•
Expires: 1967-01-17
Abstract
No abstract record available.
Inventors
- 👤 Knobel Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:16
CPC Classifications
B; B43; B43K; B43K7/00; B43K7/02; B43K24/00; B43K24/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |