US1808222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transmission system
Assignee: Individual
•
Filing: 1921-03-22
•
Granted: 1931-06-02
•
Expires: 1941-03-22
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Hild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:25
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/084; F; F16; F16H; F16H3/00; F16H3/44; F16H3/72; F16H3/727
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) | 1934-06-01 | 1934-12-01 | 1935-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-06-01 | 1938-12-01 | 1939-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-06-01 | 1942-12-01 | 1943-06-02 | $7700.00 | Window Closed / Lapsed |