US2813511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing instrument
Assignee: Parker Pen Co
•
Filing: 1955-07-05
•
Granted: 1957-11-19
•
Expires: 1975-07-05
Abstract
No abstract record available.
Inventors
- 👤 William H Kersten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:31
CPC Classifications
B; B43; B43K; B43K24/00; B43K24/02; B43K24/03; Y; Y10; Y10S; Y10S7/00; Y10S7/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US362121A
Cited
US2734484A
Cited
US2536923A
Cited
US2580754A
Cited
FR948908A
Cited
US2678578A
Cited
US2711022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |