US2556518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for aiding in chart making
Assignee: Individual
•
Filing: 1947-04-30
•
Granted: 1951-06-12
•
Expires: 1967-04-30
Abstract
No abstract record available.
Inventors
- 👤 Bryngelson Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:35
CPC Classifications
B; B43; B43L; B43L13/00; B43L7/00; G; G06; G06G; G06G1/00; G06G1/0005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1665898A
Cited
US918947A
Cited
US1237721A
Cited
US1492811A
Cited
US2054420A
Cited
US2070675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |