US1156447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust for internal-combustion engines.
Assignee: Individual
•
Filing: 1913-12-11
•
Granted: 1915-10-12
•
Expires: 1933-12-11
Abstract
No abstract record available.
Inventors
- 👤 John M Underwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:54
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/06; F16K15/04; F16K15/042; F04; F04B; F04B39/00; F04B39/10; F04B39/102; F04B39/1033; F16K15/063; F16K15/066; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838
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) | 1918-10-11 | 1919-04-12 | 1919-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1922-10-11 | 1923-04-12 | 1923-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1926-10-11 | 1927-04-12 | 1927-10-12 | $7700.00 | Window Closed / Lapsed |