Patent US939669A successfully refreshed from Google Patents.
US939669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosive-engine.
Assignee: Individual
•
Filing: 1909-03-05
•
Granted: 1909-11-09
•
Expires: 1929-03-05
Abstract
No abstract record available.
Inventors
- 👤 Albert J Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:44
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/32; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18216; Y10T74/18232; Y10T74/1824; Y10T74/21; Y10T74/2142; Y10T74/2144; Y10T74/2146
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) | 1912-11-08 | 1913-05-10 | 1913-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-11-08 | 1917-05-10 | 1917-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-11-08 | 1921-05-10 | 1921-11-09 | $7700.00 | Window Closed / Lapsed |