US2504189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing instrument having an ellipsoid point revolving in a race
Assignee: Individual
•
Filing: 1947-07-14
•
Granted: 1950-04-18
•
Expires: 1967-07-14
Abstract
No abstract record available.
Inventors
- 👤 John B Ehrhart
- 👤 Byron A Piner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:47
CPC Classifications
B; B43; B43K; B43K8/00; B43K8/20
Claims Analysis
Total Claims: 0
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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) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |