US2713205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-dimensional and spherical ruler
Assignee: Individual
•
Filing: 1950-03-29
•
Granted: 1955-07-19
•
Expires: 1970-03-29
Abstract
No abstract record available.
Inventors
- 👤 Kaj L Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:11
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/20; B43L13/201; B43L13/205
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) | 1958-07-18 | 1959-01-17 | 1959-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-18 | 1963-01-17 | 1963-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-18 | 1967-01-17 | 1967-07-19 | $7700.00 | Window Closed / Lapsed |