Patent US4420461A successfully refreshed from Google Patents.
US2438337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination rule and compass
Assignee: Individual
•
Filing: 1944-09-27
•
Granted: 1948-03-23
•
Expires: 1964-09-27
Abstract
No abstract record available.
Inventors
- 👤 Louis J Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:56
CPC Classifications
B; B43; B43L; B43L7/00; B43L7/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US45535A
Cited
US392143A
Cited
US776987A
Cited
US854325A
Cited
US1182638A
Cited
US1188644A
Cited
US1366800A
Cited
US1402629A
Cited
US1602490A
Cited
US1808705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-23 | 1951-09-22 | 1952-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-23 | 1955-09-22 | 1956-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-23 | 1959-09-22 | 1960-03-23 | $7700.00 | Window Closed / Lapsed |