Patent US1071815A successfully refreshed from Google Patents.
US1071815A
Expired / Lapsed
US
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Apparatus for determination of periodic motion.
Assignee: Individual
•
Filing: 1912-08-08
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Granted: 1913-09-02
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Expires: 1932-08-08
Abstract
No abstract record available.
Inventors
- 👤 Elmer A Sperry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:46
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/36; G01P3/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1916-09-01 | 1917-03-03 | 1917-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1920-09-01 | 1921-03-03 | 1921-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1924-09-01 | 1925-03-03 | 1925-09-02 | $7700.00 | Window Closed / Lapsed |