US1383087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attachment for engines
Assignee: STEPHEN BURTON MITCHELL
•
Filing: 1920-01-31
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Granted: 1921-06-28
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Expires: 1940-01-31
Abstract
No abstract record available.
Inventors
- 👤 Dunn Felix Ewing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:53
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K2200/00; F16K2200/30; F16K2200/305; F16K2200/3052; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7898
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) | 1924-06-27 | 1924-12-27 | 1925-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-06-27 | 1928-12-27 | 1929-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-06-27 | 1932-12-27 | 1933-06-28 | $7700.00 | Window Closed / Lapsed |