US2804692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric micrometer ultra precision level
Assignee: Individual
•
Filing: 1954-03-08
•
Granted: 1957-09-03
•
Expires: 1974-03-08
Abstract
No abstract record available.
Inventors
- 👤 Edward S Karstens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:43
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR548648A
Cited
US1395133A
Cited
GB185806A
Cited
DE635090C
Cited
US2292968A
Cited
US2438758A
Cited
US2557021A
Cited
US2553668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |