Patent US1697691A successfully refreshed from Google Patents.
US1697691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locomotive-booster apparatus
Assignee: Franklin Railway Supply Co
•
Filing: 1926-05-07
•
Granted: 1929-01-01
•
Expires: 1946-05-07
Abstract
No abstract record available.
Inventors
- 👤 Peters Frank Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:48
CPC Classifications
B; B61; B61C; B61C15/00; B61C15/02; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87917; Y10T137/88046
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) | 1932-01-01 | 1932-07-02 | 1933-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-01-01 | 1936-07-02 | 1937-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-01-01 | 1940-07-02 | 1941-01-01 | $7700.00 | Window Closed / Lapsed |