US2680296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple crayon for drawing simultaneously a plurality of spaced parallel lines
Assignee: Individual
•
Filing: 1952-12-05
•
Granted: 1954-06-08
•
Expires: 1972-12-05
Abstract
No abstract record available.
Inventors
- 👤 Cronberger Luther Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:25
CPC Classifications
B; B43; B43K; B43K27/00; B43K27/04; B43K17/00; B43K17/02
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) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |