Patent US3494363A successfully refreshed from Google Patents.
US2921301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distance measuring system
Assignee: Parsons Government Services Inc
•
Filing: 1956-07-06
•
Granted: 1960-01-12
•
Expires: 1976-07-06
Abstract
No abstract record available.
Inventors
- 👤 Victor F Cartwright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:00
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/76
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB288233A
Cited
US2509331A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |