US2591187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine exhaust condenser
Assignee: Individual
•
Filing: 1950-04-18
•
Granted: 1952-04-01
•
Expires: 1970-04-18
Abstract
No abstract record available.
Inventors
- 👤 Robert E Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:35
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/05; F01N3/005; F01P; F01P11/00; F01P11/02; F01N2240/00; F01N2240/02; F01N2290/00; F01N2290/02; F01N2290/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1503374A
Cited
US1186319A
Cited
US1426047A
Cited
US1653603A
Cited
US1728973A
Cited
US2310767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |