Patent US1616731A successfully refreshed from Google Patents.
US1616731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring motor
Assignee: SONORA PHONOGRAPH Co Inc
•
Filing: 1921-12-24
•
Granted: 1927-02-08
•
Expires: 1941-12-24
Abstract
No abstract record available.
Inventors
- 👤 Wolff Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:02
CPC Classifications
F; F03; F03G; F03G1/00; F03G1/02; F03G1/022
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1930-02-07 | 1930-08-09 | 1931-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-02-07 | 1934-08-09 | 1935-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-02-07 | 1938-08-09 | 1939-02-08 | $7700.00 | Window Closed / Lapsed |