US3427724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicating device
Assignee: Individual
•
Filing: 1965-09-20
•
Granted: 1969-02-18
•
Expires: 1985-09-20
Abstract
No abstract record available.
Inventors
- 👤 Harold James Tracy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:17
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US393879A
Cited
US577386A
Cited
US689323A
Cited
US735763A
Cited
US1359474A
Cited
FR510490A
Cited
US1552140A
Cited
US2505884A
Cited
US2499737A
Cited
US2694866A
Cited
US2764155A
Cited
US2990622A
Cited
US3160962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |