Patent US3373493A successfully refreshed from Google Patents.
US3373493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Navigational device
Assignee: MELVIN E LIND
•
Filing: 1965-04-19
•
Granted: 1968-03-19
•
Expires: 1985-04-19
Abstract
No abstract record available.
Inventors
- 👤 Hugh C Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:55
CPC Classifications
G; G01; G01C; G01C21/00; G01C21/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2007986A
Cited
US1984390A
Cited
US2114652A
Cited
US2235177A
Cited
US2364731A
Cited
US2357131A
Cited
US2569505A
Cited
US2546836A
Cited
US2756929A
Cited
US3094781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |